/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/unroll-cond-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 13:59:37,775 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 13:59:37,777 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 13:59:37,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 13:59:37,869 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 13:59:37,903 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 13:59:37,903 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 13:59:37,904 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 13:59:37,904 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 13:59:37,906 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 13:59:37,906 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 13:59:37,906 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 13:59:37,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 13:59:37,907 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 13:59:37,907 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 13:59:37,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 13:59:37,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 13:59:37,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 13:59:37,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 13:59:37,908 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 13:59:37,909 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 13:59:37,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 13:59:37,909 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 13:59:37,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 13:59:37,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 13:59:37,909 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 13:59:37,909 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 13:59:37,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 13:59:37,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 13:59:37,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 13:59:37,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 13:59:37,910 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 13:59:37,910 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 13:59:37,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 13:59:37,911 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 13:59:37,911 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 13:59:37,911 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 13:59:37,911 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 13:59:38,213 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 13:59:38,233 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 13:59:38,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 13:59:38,236 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 13:59:38,237 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 13:59:38,238 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-3.wvr.bpl [2021-06-05 13:59:38,238 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-3.wvr.bpl' [2021-06-05 13:59:38,280 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 13:59:38,282 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 13:59:38,283 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 13:59:38,283 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 13:59:38,283 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 13:59:38,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:59:38" (1/1) ... [2021-06-05 13:59:38,301 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:59:38" (1/1) ... [2021-06-05 13:59:38,308 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 13:59:38,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 13:59:38,314 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 13:59:38,314 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 13:59:38,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:59:38" (1/1) ... [2021-06-05 13:59:38,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:59:38" (1/1) ... [2021-06-05 13:59:38,322 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:59:38" (1/1) ... [2021-06-05 13:59:38,322 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:59:38" (1/1) ... [2021-06-05 13:59:38,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:59:38" (1/1) ... [2021-06-05 13:59:38,329 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:59:38" (1/1) ... [2021-06-05 13:59:38,329 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:59:38" (1/1) ... [2021-06-05 13:59:38,330 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 13:59:38,332 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 13:59:38,332 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 13:59:38,334 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 13:59:38,335 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:59:38" (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 13:59:38,395 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 13:59:38,396 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 13:59:38,396 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 13:59:38,396 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 13:59:38,396 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 13:59:38,396 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 13:59:38,396 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 13:59:38,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 13:59:38,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 13:59:38,398 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 13:59:38,742 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 13:59:38,742 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 13:59:38,743 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 13:59:38,744 INFO L202 PluginConnector]: Adding new model unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:59:38 BoogieIcfgContainer [2021-06-05 13:59:38,744 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 13:59:38,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 13:59:38,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 13:59:38,748 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 13:59:38,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:59:38" (1/2) ... [2021-06-05 13:59:38,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@413615ca and model type unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 01:59:38, skipping insertion in model container [2021-06-05 13:59:38,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:59:38" (2/2) ... [2021-06-05 13:59:38,758 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.bpl [2021-06-05 13:59:38,763 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 13:59:38,763 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 13:59:38,763 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 13:59:38,764 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 13:59:38,785 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 13:59:38,802 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 13:59:38,822 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:59:38,822 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:59:38,823 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:59:38,823 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:59:38,823 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:59:38,823 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:59:38,823 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:59:38,823 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 13:59:38,832 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-06-05 13:59:38,840 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:38,841 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:38,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 13:59:38,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:38,846 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:38,846 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:38,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:38,851 INFO L82 PathProgramCache]: Analyzing trace with hash -163389209, now seen corresponding path program 1 times [2021-06-05 13:59:38,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:38,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157716950] [2021-06-05 13:59:38,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:38,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:39,067 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 13:59:39,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:39,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157716950] [2021-06-05 13:59:39,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157716950] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:59:39,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:59:39,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:59:39,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431292960] [2021-06-05 13:59:39,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:59:39,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:39,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:59:39,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:59:39,087 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 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 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:39,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:39,134 INFO L93 Difference]: Finished difference Result 26 states and 43 transitions. [2021-06-05 13:59:39,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 13:59:39,136 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 13:59:39,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:39,144 INFO L225 Difference]: With dead ends: 26 [2021-06-05 13:59:39,144 INFO L226 Difference]: Without dead ends: 18 [2021-06-05 13:59:39,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:59:39,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-06-05 13:59:39,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-06-05 13:59:39,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 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 13:59:39,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 32 transitions. [2021-06-05 13:59:39,167 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 32 transitions. Word has length 10 [2021-06-05 13:59:39,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:39,167 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 32 transitions. [2021-06-05 13:59:39,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:39,168 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 32 transitions. [2021-06-05 13:59:39,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 13:59:39,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:39,169 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:39,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 13:59:39,169 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:39,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:39,170 INFO L82 PathProgramCache]: Analyzing trace with hash 580194151, now seen corresponding path program 2 times [2021-06-05 13:59:39,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:39,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069510253] [2021-06-05 13:59:39,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:39,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:39,215 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 13:59:39,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:39,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069510253] [2021-06-05 13:59:39,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069510253] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:59:39,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:59:39,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:59:39,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729226620] [2021-06-05 13:59:39,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:59:39,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:39,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:59:39,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:59:39,219 INFO L87 Difference]: Start difference. First operand 18 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:39,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:39,246 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-06-05 13:59:39,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:59:39,247 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 13:59:39,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:39,247 INFO L225 Difference]: With dead ends: 28 [2021-06-05 13:59:39,247 INFO L226 Difference]: Without dead ends: 23 [2021-06-05 13:59:39,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:59:39,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-06-05 13:59:39,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-06-05 13:59:39,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:39,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-06-05 13:59:39,252 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-06-05 13:59:39,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:39,253 INFO L482 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-06-05 13:59:39,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:39,253 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-06-05 13:59:39,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 13:59:39,253 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:39,254 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:39,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 13:59:39,254 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:39,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:39,255 INFO L82 PathProgramCache]: Analyzing trace with hash -824603045, now seen corresponding path program 1 times [2021-06-05 13:59:39,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:39,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843086371] [2021-06-05 13:59:39,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:39,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:39,397 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 13:59:39,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:39,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843086371] [2021-06-05 13:59:39,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843086371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:39,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122492776] [2021-06-05 13:59:39,398 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 13:59:39,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:39,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:59:39,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:39,708 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 13:59:39,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:39,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:39,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:59:39,717 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-05 13:59:39,726 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 13:59:39,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122492776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:39,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:39,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 13:59:39,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084218674] [2021-06-05 13:59:39,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:59:39,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:39,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:59:39,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:59:39,735 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:39,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:39,802 INFO L93 Difference]: Finished difference Result 30 states and 51 transitions. [2021-06-05 13:59:39,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:59:39,802 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 13:59:39,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:39,803 INFO L225 Difference]: With dead ends: 30 [2021-06-05 13:59:39,804 INFO L226 Difference]: Without dead ends: 22 [2021-06-05 13:59:39,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 120.0ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:59:39,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-06-05 13:59:39,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-06-05 13:59:39,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:39,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-06-05 13:59:39,811 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-06-05 13:59:39,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:39,812 INFO L482 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-06-05 13:59:39,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:39,812 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-06-05 13:59:39,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 13:59:39,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:39,813 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:40,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 13:59:40,033 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:40,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:40,034 INFO L82 PathProgramCache]: Analyzing trace with hash -81019685, now seen corresponding path program 2 times [2021-06-05 13:59:40,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:40,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917215181] [2021-06-05 13:59:40,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:40,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:40,119 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 13:59:40,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:40,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917215181] [2021-06-05 13:59:40,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917215181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:40,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341657176] [2021-06-05 13:59:40,120 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 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 13:59:40,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:59:40,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:40,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:59:40,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:40,305 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 13:59:40,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:40,317 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:40,319 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-06-05 13:59:40,323 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 13:59:40,358 INFO L628 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2021-06-05 13:59:40,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 13:59:40,360 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-06-05 13:59:40,409 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 13:59:40,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341657176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:40,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:40,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 13:59:40,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352518860] [2021-06-05 13:59:40,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:59:40,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:40,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:59:40,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:59:40,410 INFO L87 Difference]: Start difference. First operand 22 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:40,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:40,485 INFO L93 Difference]: Finished difference Result 35 states and 68 transitions. [2021-06-05 13:59:40,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:59:40,485 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 13:59:40,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:40,486 INFO L225 Difference]: With dead ends: 35 [2021-06-05 13:59:40,486 INFO L226 Difference]: Without dead ends: 30 [2021-06-05 13:59:40,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 97.6ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:59:40,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-06-05 13:59:40,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2021-06-05 13:59:40,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:40,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-06-05 13:59:40,490 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-06-05 13:59:40,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:40,490 INFO L482 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-06-05 13:59:40,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:40,490 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-06-05 13:59:40,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 13:59:40,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:40,491 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:40,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:40,705 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:40,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:40,705 INFO L82 PathProgramCache]: Analyzing trace with hash 770124447, now seen corresponding path program 3 times [2021-06-05 13:59:40,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:40,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268360664] [2021-06-05 13:59:40,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:40,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:40,750 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 13:59:40,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:40,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268360664] [2021-06-05 13:59:40,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268360664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:40,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040621100] [2021-06-05 13:59:40,751 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 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 13:59:40,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 13:59:40,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:40,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:59:40,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:40,892 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 13:59:40,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:40,900 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:40,900 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-06-05 13:59:40,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 13:59:40,940 INFO L628 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2021-06-05 13:59:40,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 13:59:40,941 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-06-05 13:59:40,983 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 13:59:40,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040621100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:40,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:40,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 13:59:40,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156537029] [2021-06-05 13:59:40,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:59:40,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:40,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:59:40,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:59:40,989 INFO L87 Difference]: Start difference. First operand 22 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:41,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:41,141 INFO L93 Difference]: Finished difference Result 51 states and 88 transitions. [2021-06-05 13:59:41,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:59:41,141 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 13:59:41,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:41,143 INFO L225 Difference]: With dead ends: 51 [2021-06-05 13:59:41,143 INFO L226 Difference]: Without dead ends: 41 [2021-06-05 13:59:41,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 164.3ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:59:41,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-06-05 13:59:41,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2021-06-05 13:59:41,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:41,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 46 transitions. [2021-06-05 13:59:41,154 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 46 transitions. Word has length 11 [2021-06-05 13:59:41,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:41,154 INFO L482 AbstractCegarLoop]: Abstraction has 26 states and 46 transitions. [2021-06-05 13:59:41,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:41,154 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 46 transitions. [2021-06-05 13:59:41,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 13:59:41,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:41,155 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:41,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:41,369 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:41,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:41,370 INFO L82 PathProgramCache]: Analyzing trace with hash 108860664, now seen corresponding path program 1 times [2021-06-05 13:59:41,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:41,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853003050] [2021-06-05 13:59:41,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:41,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:41,395 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 13:59:41,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:41,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853003050] [2021-06-05 13:59:41,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853003050] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:59:41,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:59:41,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:59:41,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083867913] [2021-06-05 13:59:41,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 13:59:41,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:41,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 13:59:41,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:59:41,398 INFO L87 Difference]: Start difference. First operand 26 states and 46 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:41,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:41,418 INFO L93 Difference]: Finished difference Result 29 states and 52 transitions. [2021-06-05 13:59:41,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 13:59:41,419 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 13:59:41,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:41,420 INFO L225 Difference]: With dead ends: 29 [2021-06-05 13:59:41,421 INFO L226 Difference]: Without dead ends: 29 [2021-06-05 13:59:41,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:59:41,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-06-05 13:59:41,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-06-05 13:59:41,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:41,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 49 transitions. [2021-06-05 13:59:41,428 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 49 transitions. Word has length 11 [2021-06-05 13:59:41,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:41,429 INFO L482 AbstractCegarLoop]: Abstraction has 27 states and 49 transitions. [2021-06-05 13:59:41,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:41,429 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 49 transitions. [2021-06-05 13:59:41,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 13:59:41,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:41,430 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:41,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 13:59:41,430 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:41,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:41,431 INFO L82 PathProgramCache]: Analyzing trace with hash 152604519, now seen corresponding path program 4 times [2021-06-05 13:59:41,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:41,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394073626] [2021-06-05 13:59:41,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:41,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:41,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:41,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:41,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394073626] [2021-06-05 13:59:41,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394073626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:41,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777595387] [2021-06-05 13:59:41,510 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 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 13:59:41,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:59:41,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:41,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:59:41,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:41,699 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:41,699 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-06-05 13:59:41,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:41,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:41,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:59:41,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-06-05 13:59:41,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:41,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777595387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:41,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:41,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 13:59:41,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527353452] [2021-06-05 13:59:41,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:59:41,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:41,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:59:41,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:59:41,717 INFO L87 Difference]: Start difference. First operand 27 states and 49 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:41,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:41,772 INFO L93 Difference]: Finished difference Result 39 states and 72 transitions. [2021-06-05 13:59:41,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:59:41,772 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 13:59:41,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:41,773 INFO L225 Difference]: With dead ends: 39 [2021-06-05 13:59:41,773 INFO L226 Difference]: Without dead ends: 34 [2021-06-05 13:59:41,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:59:41,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-06-05 13:59:41,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-06-05 13:59:41,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:41,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 60 transitions. [2021-06-05 13:59:41,776 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 60 transitions. Word has length 12 [2021-06-05 13:59:41,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:41,776 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 60 transitions. [2021-06-05 13:59:41,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:41,776 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 60 transitions. [2021-06-05 13:59:41,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 13:59:41,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:41,777 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:41,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:41,999 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:42,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:42,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1747332011, now seen corresponding path program 5 times [2021-06-05 13:59:42,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:42,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781183565] [2021-06-05 13:59:42,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:42,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:42,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:42,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:42,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781183565] [2021-06-05 13:59:42,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781183565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:42,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865164286] [2021-06-05 13:59:42,052 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 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 13:59:42,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:59:42,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:42,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:59:42,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:42,212 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:42,213 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-06-05 13:59:42,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:42,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:42,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:59:42,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-06-05 13:59:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:42,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865164286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:42,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:42,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 13:59:42,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859480174] [2021-06-05 13:59:42,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:59:42,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:42,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:59:42,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:59:42,230 INFO L87 Difference]: Start difference. First operand 32 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:42,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:42,299 INFO L93 Difference]: Finished difference Result 50 states and 85 transitions. [2021-06-05 13:59:42,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:59:42,300 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 13:59:42,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:42,300 INFO L225 Difference]: With dead ends: 50 [2021-06-05 13:59:42,300 INFO L226 Difference]: Without dead ends: 45 [2021-06-05 13:59:42,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:59:42,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-06-05 13:59:42,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2021-06-05 13:59:42,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:42,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 60 transitions. [2021-06-05 13:59:42,307 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 60 transitions. Word has length 12 [2021-06-05 13:59:42,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:42,307 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 60 transitions. [2021-06-05 13:59:42,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:42,308 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 60 transitions. [2021-06-05 13:59:42,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 13:59:42,308 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:42,308 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:42,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 13:59:42,529 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:42,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:42,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1086068228, now seen corresponding path program 1 times [2021-06-05 13:59:42,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:42,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235356731] [2021-06-05 13:59:42,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:42,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:42,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:42,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:42,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235356731] [2021-06-05 13:59:42,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235356731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:42,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417489928] [2021-06-05 13:59:42,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:42,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:42,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 13:59:42,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:42,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:42,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417489928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:42,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:42,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 13:59:42,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438431850] [2021-06-05 13:59:42,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:59:42,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:42,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:59:42,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:59:42,616 INFO L87 Difference]: Start difference. First operand 32 states and 60 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:42,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:42,655 INFO L93 Difference]: Finished difference Result 58 states and 102 transitions. [2021-06-05 13:59:42,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:59:42,656 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 13:59:42,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:42,656 INFO L225 Difference]: With dead ends: 58 [2021-06-05 13:59:42,656 INFO L226 Difference]: Without dead ends: 58 [2021-06-05 13:59:42,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 21.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:59:42,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-06-05 13:59:42,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2021-06-05 13:59:42,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:42,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 64 transitions. [2021-06-05 13:59:42,659 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 64 transitions. Word has length 12 [2021-06-05 13:59:42,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:42,660 INFO L482 AbstractCegarLoop]: Abstraction has 33 states and 64 transitions. [2021-06-05 13:59:42,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:42,660 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 64 transitions. [2021-06-05 13:59:42,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 13:59:42,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:42,660 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:42,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:42,881 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:42,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:42,881 INFO L82 PathProgramCache]: Analyzing trace with hash -974791574, now seen corresponding path program 2 times [2021-06-05 13:59:42,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:42,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351220390] [2021-06-05 13:59:42,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:42,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:42,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:42,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351220390] [2021-06-05 13:59:42,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351220390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:42,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488900296] [2021-06-05 13:59:42,916 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 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 13:59:42,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:59:42,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:42,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 13:59:42,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:42,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:42,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488900296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:42,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:42,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 13:59:42,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85418356] [2021-06-05 13:59:42,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:59:42,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:42,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:59:42,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:59:42,980 INFO L87 Difference]: Start difference. First operand 33 states and 64 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:43,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:43,030 INFO L93 Difference]: Finished difference Result 44 states and 85 transitions. [2021-06-05 13:59:43,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:59:43,030 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 13:59:43,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:43,031 INFO L225 Difference]: With dead ends: 44 [2021-06-05 13:59:43,031 INFO L226 Difference]: Without dead ends: 44 [2021-06-05 13:59:43,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:59:43,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-06-05 13:59:43,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2021-06-05 13:59:43,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:43,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 70 transitions. [2021-06-05 13:59:43,043 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 70 transitions. Word has length 12 [2021-06-05 13:59:43,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:43,043 INFO L482 AbstractCegarLoop]: Abstraction has 35 states and 70 transitions. [2021-06-05 13:59:43,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:43,043 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 70 transitions. [2021-06-05 13:59:43,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:59:43,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:43,044 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:43,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:43,245 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:43,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:43,245 INFO L82 PathProgramCache]: Analyzing trace with hash 381267931, now seen corresponding path program 6 times [2021-06-05 13:59:43,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:43,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696677991] [2021-06-05 13:59:43,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:43,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:43,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:43,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:43,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696677991] [2021-06-05 13:59:43,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696677991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:43,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653388223] [2021-06-05 13:59:43,292 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 13:59:43,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:59:43,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:43,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 13:59:43,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:43,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:43,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653388223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:43,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:43,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 13:59:43,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372792513] [2021-06-05 13:59:43,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:59:43,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:43,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:59:43,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:59:43,373 INFO L87 Difference]: Start difference. First operand 35 states and 70 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 13:59:43,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:43,417 INFO L93 Difference]: Finished difference Result 67 states and 115 transitions. [2021-06-05 13:59:43,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:59:43,417 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 13 [2021-06-05 13:59:43,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:43,419 INFO L225 Difference]: With dead ends: 67 [2021-06-05 13:59:43,419 INFO L226 Difference]: Without dead ends: 67 [2021-06-05 13:59:43,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:59:43,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-05 13:59:43,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 35. [2021-06-05 13:59:43,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:43,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 72 transitions. [2021-06-05 13:59:43,425 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 72 transitions. Word has length 13 [2021-06-05 13:59:43,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:43,425 INFO L482 AbstractCegarLoop]: Abstraction has 35 states and 72 transitions. [2021-06-05 13:59:43,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 13:59:43,425 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 72 transitions. [2021-06-05 13:59:43,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:59:43,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:43,426 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:43,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 13:59:43,633 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:43,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:43,633 INFO L82 PathProgramCache]: Analyzing trace with hash 462398216, now seen corresponding path program 3 times [2021-06-05 13:59:43,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:43,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439626947] [2021-06-05 13:59:43,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:43,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:43,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:43,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:43,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439626947] [2021-06-05 13:59:43,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439626947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:43,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098723815] [2021-06-05 13:59:43,664 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 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 13:59:43,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 13:59:43,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:43,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 13:59:43,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:43,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:43,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098723815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:43,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:43,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 13:59:43,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558957739] [2021-06-05 13:59:43,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:59:43,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:43,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:59:43,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:59:43,732 INFO L87 Difference]: Start difference. First operand 35 states and 72 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 13:59:43,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:43,798 INFO L93 Difference]: Finished difference Result 80 states and 140 transitions. [2021-06-05 13:59:43,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:59:43,798 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 13 [2021-06-05 13:59:43,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:43,799 INFO L225 Difference]: With dead ends: 80 [2021-06-05 13:59:43,799 INFO L226 Difference]: Without dead ends: 77 [2021-06-05 13:59:43,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:59:43,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-06-05 13:59:43,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 40. [2021-06-05 13:59:43,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:43,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 85 transitions. [2021-06-05 13:59:43,802 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 85 transitions. Word has length 13 [2021-06-05 13:59:43,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:43,802 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 85 transitions. [2021-06-05 13:59:43,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 13:59:43,802 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 85 transitions. [2021-06-05 13:59:43,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:59:43,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:43,803 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:44,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:44,017 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:44,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:44,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1975995423, now seen corresponding path program 7 times [2021-06-05 13:59:44,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:44,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298992138] [2021-06-05 13:59:44,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:44,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:44,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:44,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:44,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298992138] [2021-06-05 13:59:44,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298992138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:44,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13655552] [2021-06-05 13:59:44,050 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 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 13:59:44,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:44,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 13:59:44,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:44,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:44,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13655552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:44,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:44,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 13:59:44,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721872924] [2021-06-05 13:59:44,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:59:44,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:44,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:59:44,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:59:44,126 INFO L87 Difference]: Start difference. First operand 40 states and 85 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 13:59:44,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:44,185 INFO L93 Difference]: Finished difference Result 51 states and 98 transitions. [2021-06-05 13:59:44,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:59:44,186 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 13 [2021-06-05 13:59:44,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:44,186 INFO L225 Difference]: With dead ends: 51 [2021-06-05 13:59:44,186 INFO L226 Difference]: Without dead ends: 49 [2021-06-05 13:59:44,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:59:44,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-06-05 13:59:44,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2021-06-05 13:59:44,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:44,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 84 transitions. [2021-06-05 13:59:44,199 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 84 transitions. Word has length 13 [2021-06-05 13:59:44,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:44,201 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 84 transitions. [2021-06-05 13:59:44,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 13:59:44,201 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 84 transitions. [2021-06-05 13:59:44,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:59:44,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:44,202 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:44,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:44,402 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:44,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:44,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1314731640, now seen corresponding path program 4 times [2021-06-05 13:59:44,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:44,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657450353] [2021-06-05 13:59:44,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:44,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:44,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:44,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:44,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657450353] [2021-06-05 13:59:44,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657450353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:44,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870856471] [2021-06-05 13:59:44,477 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 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 13:59:44,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:59:44,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:44,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 13:59:44,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:44,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:44,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870856471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:44,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:44,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 13:59:44,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581267058] [2021-06-05 13:59:44,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:59:44,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:44,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:59:44,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:59:44,552 INFO L87 Difference]: Start difference. First operand 40 states and 84 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 13:59:44,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:44,593 INFO L93 Difference]: Finished difference Result 68 states and 122 transitions. [2021-06-05 13:59:44,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:59:44,593 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 13 [2021-06-05 13:59:44,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:44,594 INFO L225 Difference]: With dead ends: 68 [2021-06-05 13:59:44,594 INFO L226 Difference]: Without dead ends: 68 [2021-06-05 13:59:44,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:59:44,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-06-05 13:59:44,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 38. [2021-06-05 13:59:44,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.054054054054054) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:44,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 76 transitions. [2021-06-05 13:59:44,596 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 76 transitions. Word has length 13 [2021-06-05 13:59:44,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:44,596 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 76 transitions. [2021-06-05 13:59:44,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 13:59:44,596 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 76 transitions. [2021-06-05 13:59:44,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:59:44,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:44,597 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:44,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 13:59:44,805 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:44,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:44,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1703307557, now seen corresponding path program 8 times [2021-06-05 13:59:44,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:44,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417284860] [2021-06-05 13:59:44,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:44,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:44,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:44,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:44,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417284860] [2021-06-05 13:59:44,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417284860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:44,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811607526] [2021-06-05 13:59:44,852 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 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 13:59:44,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:59:44,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:44,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 13:59:44,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:44,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:44,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811607526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:44,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:44,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 13:59:44,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634447315] [2021-06-05 13:59:44,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:59:44,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:44,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:59:44,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:59:44,916 INFO L87 Difference]: Start difference. First operand 38 states and 76 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 13:59:44,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:44,966 INFO L93 Difference]: Finished difference Result 51 states and 92 transitions. [2021-06-05 13:59:44,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:59:44,966 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 13 [2021-06-05 13:59:44,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:44,967 INFO L225 Difference]: With dead ends: 51 [2021-06-05 13:59:44,967 INFO L226 Difference]: Without dead ends: 47 [2021-06-05 13:59:44,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:59:44,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-06-05 13:59:44,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2021-06-05 13:59:44,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:44,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 75 transitions. [2021-06-05 13:59:44,969 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 75 transitions. Word has length 13 [2021-06-05 13:59:44,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:44,970 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 75 transitions. [2021-06-05 13:59:44,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 13:59:44,970 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 75 transitions. [2021-06-05 13:59:44,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:59:44,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:44,970 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:45,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 13:59:45,189 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:45,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:45,189 INFO L82 PathProgramCache]: Analyzing trace with hash -746128162, now seen corresponding path program 5 times [2021-06-05 13:59:45,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:45,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674813129] [2021-06-05 13:59:45,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:45,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:45,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:45,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:45,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674813129] [2021-06-05 13:59:45,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674813129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:45,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332010992] [2021-06-05 13:59:45,218 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 13:59:45,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:59:45,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:45,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 13:59:45,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:45,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:45,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332010992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:45,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:45,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 13:59:45,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869139285] [2021-06-05 13:59:45,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:59:45,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:45,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:59:45,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:59:45,280 INFO L87 Difference]: Start difference. First operand 38 states and 75 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 13:59:45,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:45,329 INFO L93 Difference]: Finished difference Result 61 states and 111 transitions. [2021-06-05 13:59:45,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:59:45,329 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 13 [2021-06-05 13:59:45,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:45,329 INFO L225 Difference]: With dead ends: 61 [2021-06-05 13:59:45,329 INFO L226 Difference]: Without dead ends: 61 [2021-06-05 13:59:45,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:59:45,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-06-05 13:59:45,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2021-06-05 13:59:45,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:45,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 75 transitions. [2021-06-05 13:59:45,332 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 75 transitions. Word has length 13 [2021-06-05 13:59:45,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:45,332 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 75 transitions. [2021-06-05 13:59:45,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 13:59:45,332 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 75 transitions. [2021-06-05 13:59:45,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:59:45,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:45,332 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:45,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 13:59:45,537 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:45,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:45,537 INFO L82 PathProgramCache]: Analyzing trace with hash 202417055, now seen corresponding path program 9 times [2021-06-05 13:59:45,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:45,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449516492] [2021-06-05 13:59:45,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:45,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:45,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:45,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449516492] [2021-06-05 13:59:45,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449516492] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:59:45,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:59:45,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 13:59:45,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553598700] [2021-06-05 13:59:45,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:59:45,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:45,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:59:45,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:59:45,565 INFO L87 Difference]: Start difference. First operand 38 states and 75 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:45,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:45,584 INFO L93 Difference]: Finished difference Result 42 states and 79 transitions. [2021-06-05 13:59:45,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:59:45,584 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 13:59:45,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:45,585 INFO L225 Difference]: With dead ends: 42 [2021-06-05 13:59:45,585 INFO L226 Difference]: Without dead ends: 36 [2021-06-05 13:59:45,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:59:45,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-06-05 13:59:45,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-06-05 13:59:45,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:45,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 71 transitions. [2021-06-05 13:59:45,587 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 71 transitions. Word has length 13 [2021-06-05 13:59:45,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:45,587 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 71 transitions. [2021-06-05 13:59:45,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:45,587 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 71 transitions. [2021-06-05 13:59:45,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:59:45,587 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:45,588 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:45,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-06-05 13:59:45,588 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:45,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:45,588 INFO L82 PathProgramCache]: Analyzing trace with hash -208272584, now seen corresponding path program 6 times [2021-06-05 13:59:45,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:45,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198769272] [2021-06-05 13:59:45,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:45,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:45,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:45,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:45,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198769272] [2021-06-05 13:59:45,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198769272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:45,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202889080] [2021-06-05 13:59:45,613 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 13:59:45,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:59:45,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:45,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 13:59:45,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:45,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:45,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202889080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:45,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:45,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 13:59:45,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817898239] [2021-06-05 13:59:45,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:59:45,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:45,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:59:45,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:59:45,677 INFO L87 Difference]: Start difference. First operand 36 states and 71 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 13:59:45,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:45,731 INFO L93 Difference]: Finished difference Result 61 states and 119 transitions. [2021-06-05 13:59:45,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:59:45,732 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 13 [2021-06-05 13:59:45,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:45,732 INFO L225 Difference]: With dead ends: 61 [2021-06-05 13:59:45,732 INFO L226 Difference]: Without dead ends: 61 [2021-06-05 13:59:45,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:59:45,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-06-05 13:59:45,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 41. [2021-06-05 13:59:45,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:45,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 83 transitions. [2021-06-05 13:59:45,738 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 83 transitions. Word has length 13 [2021-06-05 13:59:45,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:45,738 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 83 transitions. [2021-06-05 13:59:45,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 13:59:45,739 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 83 transitions. [2021-06-05 13:59:45,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:59:45,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:45,739 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:45,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:45,953 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:45,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:45,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1038970604, now seen corresponding path program 7 times [2021-06-05 13:59:45,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:45,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26634623] [2021-06-05 13:59:45,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:45,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:46,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:46,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:46,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26634623] [2021-06-05 13:59:46,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26634623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:46,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875081772] [2021-06-05 13:59:46,019 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 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 13:59:46,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:46,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:59:46,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:46,233 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:46,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 13:59:46,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:46,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:46,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:59:46,250 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 13:59:46,255 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:46,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875081772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:46,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:46,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 13:59:46,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396593321] [2021-06-05 13:59:46,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:59:46,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:46,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:59:46,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:59:46,257 INFO L87 Difference]: Start difference. First operand 41 states and 83 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:46,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:46,379 INFO L93 Difference]: Finished difference Result 56 states and 110 transitions. [2021-06-05 13:59:46,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:59:46,379 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 13:59:46,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:46,380 INFO L225 Difference]: With dead ends: 56 [2021-06-05 13:59:46,380 INFO L226 Difference]: Without dead ends: 46 [2021-06-05 13:59:46,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 159.4ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:59:46,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-06-05 13:59:46,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2021-06-05 13:59:46,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 42 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:46,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 87 transitions. [2021-06-05 13:59:46,382 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 87 transitions. Word has length 14 [2021-06-05 13:59:46,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:46,382 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 87 transitions. [2021-06-05 13:59:46,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:46,382 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 87 transitions. [2021-06-05 13:59:46,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:59:46,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:46,383 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:46,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 13:59:46,593 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:46,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:46,595 INFO L82 PathProgramCache]: Analyzing trace with hash -186637180, now seen corresponding path program 8 times [2021-06-05 13:59:46,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:46,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818621293] [2021-06-05 13:59:46,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:46,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:46,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:46,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:46,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818621293] [2021-06-05 13:59:46,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818621293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:46,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267943877] [2021-06-05 13:59:46,675 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 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 13:59:46,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:59:46,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:46,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:59:46,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:46,888 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:46,888 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 13:59:46,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:46,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:46,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:59:46,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 13:59:46,905 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:46,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267943877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:46,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:46,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 13:59:46,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397541561] [2021-06-05 13:59:46,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:59:46,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:46,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:59:46,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:59:46,907 INFO L87 Difference]: Start difference. First operand 43 states and 87 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:47,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:47,099 INFO L93 Difference]: Finished difference Result 70 states and 143 transitions. [2021-06-05 13:59:47,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:59:47,100 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 13:59:47,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:47,100 INFO L225 Difference]: With dead ends: 70 [2021-06-05 13:59:47,101 INFO L226 Difference]: Without dead ends: 56 [2021-06-05 13:59:47,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 168.2ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:59:47,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-06-05 13:59:47,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2021-06-05 13:59:47,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:47,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 102 transitions. [2021-06-05 13:59:47,103 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 102 transitions. Word has length 14 [2021-06-05 13:59:47,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:47,103 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 102 transitions. [2021-06-05 13:59:47,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:47,103 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 102 transitions. [2021-06-05 13:59:47,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:59:47,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:47,106 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:47,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:47,319 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:47,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:47,319 INFO L82 PathProgramCache]: Analyzing trace with hash 556946180, now seen corresponding path program 9 times [2021-06-05 13:59:47,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:47,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041088908] [2021-06-05 13:59:47,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:47,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:47,379 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:47,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:47,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041088908] [2021-06-05 13:59:47,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041088908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:47,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102447030] [2021-06-05 13:59:47,380 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 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 13:59:47,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:59:47,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:47,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:59:47,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:47,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:47,575 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-05 13:59:47,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 13:59:47,613 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 13:59:47,614 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:47,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:47,627 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 13:59:47,636 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:47,651 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 13:59:47,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 13:59:47,652 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-05 13:59:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:47,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102447030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:47,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:47,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 13:59:47,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658871427] [2021-06-05 13:59:47,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:59:47,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:47,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:59:47,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:59:47,684 INFO L87 Difference]: Start difference. First operand 47 states and 102 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:47,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:47,885 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2021-06-05 13:59:47,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:59:47,886 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 13:59:47,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:47,886 INFO L225 Difference]: With dead ends: 88 [2021-06-05 13:59:47,886 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 13:59:47,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 158.5ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:59:47,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 13:59:47,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 47. [2021-06-05 13:59:47,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:47,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 102 transitions. [2021-06-05 13:59:47,889 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 102 transitions. Word has length 14 [2021-06-05 13:59:47,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:47,889 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 102 transitions. [2021-06-05 13:59:47,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:47,889 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 102 transitions. [2021-06-05 13:59:47,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:59:47,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:47,890 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:48,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:48,105 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:48,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:48,105 INFO L82 PathProgramCache]: Analyzing trace with hash 2047470314, now seen corresponding path program 10 times [2021-06-05 13:59:48,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:48,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590799647] [2021-06-05 13:59:48,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:48,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:48,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:48,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590799647] [2021-06-05 13:59:48,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590799647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:48,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334283490] [2021-06-05 13:59:48,176 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 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 13:59:48,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:59:48,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:48,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:59:48,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:48,358 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:48,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 13:59:48,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:48,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:48,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:59:48,370 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 13:59:48,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:48,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334283490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:48,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:48,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 13:59:48,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715568863] [2021-06-05 13:59:48,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:59:48,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:48,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:59:48,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:59:48,375 INFO L87 Difference]: Start difference. First operand 47 states and 102 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:48,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:48,581 INFO L93 Difference]: Finished difference Result 76 states and 163 transitions. [2021-06-05 13:59:48,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:59:48,582 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 13:59:48,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:48,582 INFO L225 Difference]: With dead ends: 76 [2021-06-05 13:59:48,583 INFO L226 Difference]: Without dead ends: 62 [2021-06-05 13:59:48,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 167.8ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:59:48,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-06-05 13:59:48,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2021-06-05 13:59:48,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.3962264150943398) internal successors, (127), 53 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:48,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 127 transitions. [2021-06-05 13:59:48,587 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 127 transitions. Word has length 14 [2021-06-05 13:59:48,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:48,587 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 127 transitions. [2021-06-05 13:59:48,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:48,587 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 127 transitions. [2021-06-05 13:59:48,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:59:48,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:48,588 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:48,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 13:59:48,801 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:48,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:48,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1503913622, now seen corresponding path program 11 times [2021-06-05 13:59:48,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:48,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829343459] [2021-06-05 13:59:48,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:48,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:48,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:48,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:48,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829343459] [2021-06-05 13:59:48,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829343459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:48,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221090979] [2021-06-05 13:59:48,879 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 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 13:59:48,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:59:48,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:48,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:59:48,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:49,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:49,073 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-05 13:59:49,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 13:59:49,114 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 13:59:49,115 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:49,125 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:49,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 13:59:49,134 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:49,152 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 13:59:49,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 13:59:49,153 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-05 13:59:49,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:49,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221090979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:49,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:49,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 13:59:49,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863949163] [2021-06-05 13:59:49,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:59:49,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:49,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:59:49,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:59:49,193 INFO L87 Difference]: Start difference. First operand 54 states and 127 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:49,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:49,410 INFO L93 Difference]: Finished difference Result 101 states and 211 transitions. [2021-06-05 13:59:49,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:59:49,410 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 13:59:49,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:49,411 INFO L225 Difference]: With dead ends: 101 [2021-06-05 13:59:49,411 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 13:59:49,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 197.5ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:59:49,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 13:59:49,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 54. [2021-06-05 13:59:49,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 53 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:49,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 126 transitions. [2021-06-05 13:59:49,413 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 126 transitions. Word has length 14 [2021-06-05 13:59:49,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:49,414 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 126 transitions. [2021-06-05 13:59:49,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:49,414 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 126 transitions. [2021-06-05 13:59:49,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:59:49,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:49,414 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:49,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 13:59:49,629 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:49,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:49,629 INFO L82 PathProgramCache]: Analyzing trace with hash -652769490, now seen corresponding path program 12 times [2021-06-05 13:59:49,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:49,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12765167] [2021-06-05 13:59:49,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:49,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:49,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:49,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12765167] [2021-06-05 13:59:49,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12765167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:49,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513974688] [2021-06-05 13:59:49,708 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 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 13:59:49,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:59:49,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:49,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:59:49,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:49,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:49,880 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-05 13:59:49,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 13:59:49,906 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 13:59:49,907 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:49,920 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:49,920 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 13:59:49,928 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:49,944 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 13:59:49,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 13:59:49,945 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-05 13:59:49,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:49,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513974688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:49,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:49,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 13:59:49,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384328325] [2021-06-05 13:59:49,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:59:49,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:49,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:59:49,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:59:49,972 INFO L87 Difference]: Start difference. First operand 54 states and 126 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:50,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:50,170 INFO L93 Difference]: Finished difference Result 80 states and 179 transitions. [2021-06-05 13:59:50,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:59:50,170 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 13:59:50,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:50,171 INFO L225 Difference]: With dead ends: 80 [2021-06-05 13:59:50,171 INFO L226 Difference]: Without dead ends: 75 [2021-06-05 13:59:50,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 233.0ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:59:50,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-05 13:59:50,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2021-06-05 13:59:50,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 53 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:50,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 126 transitions. [2021-06-05 13:59:50,173 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 126 transitions. Word has length 14 [2021-06-05 13:59:50,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:50,173 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 126 transitions. [2021-06-05 13:59:50,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:50,173 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 126 transitions. [2021-06-05 13:59:50,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:59:50,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:50,174 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:50,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-06-05 13:59:50,389 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:50,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:50,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1709641404, now seen corresponding path program 13 times [2021-06-05 13:59:50,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:50,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512115611] [2021-06-05 13:59:50,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:50,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:50,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:50,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:50,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512115611] [2021-06-05 13:59:50,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512115611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:50,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244972968] [2021-06-05 13:59:50,452 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 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 13:59:50,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:50,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:59:50,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:50,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:50,624 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 13:59:50,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:50,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:50,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:59:50,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 13:59:50,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:50,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244972968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:50,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:50,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 13:59:50,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610603238] [2021-06-05 13:59:50,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:59:50,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:50,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:59:50,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:59:50,642 INFO L87 Difference]: Start difference. First operand 54 states and 126 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:50,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:50,808 INFO L93 Difference]: Finished difference Result 81 states and 183 transitions. [2021-06-05 13:59:50,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:59:50,809 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 13:59:50,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:50,809 INFO L225 Difference]: With dead ends: 81 [2021-06-05 13:59:50,809 INFO L226 Difference]: Without dead ends: 67 [2021-06-05 13:59:50,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 152.4ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:59:50,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-05 13:59:50,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2021-06-05 13:59:50,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5) internal successors, (150), 60 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:50,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2021-06-05 13:59:50,812 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 14 [2021-06-05 13:59:50,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:50,812 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2021-06-05 13:59:50,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:50,812 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2021-06-05 13:59:50,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:59:50,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:50,812 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:51,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:51,021 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:51,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:51,021 INFO L82 PathProgramCache]: Analyzing trace with hash -966058044, now seen corresponding path program 14 times [2021-06-05 13:59:51,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:51,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253806479] [2021-06-05 13:59:51,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:51,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:51,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:51,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:51,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253806479] [2021-06-05 13:59:51,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253806479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:51,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700457445] [2021-06-05 13:59:51,097 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 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 13:59:51,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:59:51,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:51,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:59:51,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:51,262 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:51,262 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-05 13:59:51,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 13:59:51,287 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 13:59:51,288 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:51,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:51,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 13:59:51,307 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:51,323 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 13:59:51,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 13:59:51,324 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-05 13:59:51,350 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:51,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700457445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:51,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:51,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 13:59:51,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889315932] [2021-06-05 13:59:51,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:59:51,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:51,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:59:51,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:59:51,351 INFO L87 Difference]: Start difference. First operand 61 states and 150 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:51,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:51,632 INFO L93 Difference]: Finished difference Result 102 states and 228 transitions. [2021-06-05 13:59:51,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:59:51,632 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 13:59:51,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:51,633 INFO L225 Difference]: With dead ends: 102 [2021-06-05 13:59:51,633 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 13:59:51,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 201.4ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:59:51,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 13:59:51,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 61. [2021-06-05 13:59:51,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5) internal successors, (150), 60 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:51,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2021-06-05 13:59:51,635 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 14 [2021-06-05 13:59:51,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:51,636 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2021-06-05 13:59:51,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:51,636 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2021-06-05 13:59:51,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:59:51,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:51,636 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:51,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:51,859 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:51,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:51,859 INFO L82 PathProgramCache]: Analyzing trace with hash -114913912, now seen corresponding path program 15 times [2021-06-05 13:59:51,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:51,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490616983] [2021-06-05 13:59:51,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:51,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:52,033 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 13:59:52,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:52,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:52,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490616983] [2021-06-05 13:59:52,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490616983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:52,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389016959] [2021-06-05 13:59:52,093 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 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 13:59:52,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:59:52,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:52,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:59:52,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:52,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:52,282 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-05 13:59:52,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 13:59:52,314 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 13:59:52,315 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:52,328 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:52,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 13:59:52,336 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:52,352 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 13:59:52,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 13:59:52,353 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-05 13:59:52,379 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:52,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389016959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:52,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:52,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 13:59:52,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629025738] [2021-06-05 13:59:52,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:59:52,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:52,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:59:52,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:59:52,381 INFO L87 Difference]: Start difference. First operand 61 states and 150 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:52,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:52,654 INFO L93 Difference]: Finished difference Result 84 states and 193 transitions. [2021-06-05 13:59:52,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:59:52,655 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 13:59:52,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:52,655 INFO L225 Difference]: With dead ends: 84 [2021-06-05 13:59:52,655 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 13:59:52,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 383.0ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:59:52,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 13:59:52,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2021-06-05 13:59:52,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5) internal successors, (150), 60 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:52,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2021-06-05 13:59:52,657 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 14 [2021-06-05 13:59:52,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:52,657 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2021-06-05 13:59:52,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:52,658 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2021-06-05 13:59:52,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:59:52,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:52,658 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:52,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 13:59:52,873 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:52,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:52,873 INFO L82 PathProgramCache]: Analyzing trace with hash 500750404, now seen corresponding path program 16 times [2021-06-05 13:59:52,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:52,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623459325] [2021-06-05 13:59:52,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:52,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:52,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:52,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:52,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623459325] [2021-06-05 13:59:52,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623459325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:52,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251571712] [2021-06-05 13:59:52,932 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 13:59:52,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:59:52,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:52,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:59:52,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:53,105 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:53,106 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-05 13:59:53,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 13:59:53,141 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 13:59:53,142 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:53,155 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:53,155 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 13:59:53,161 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:53,178 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 13:59:53,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 13:59:53,179 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-05 13:59:53,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:53,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251571712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:53,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:53,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 13:59:53,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869569013] [2021-06-05 13:59:53,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:59:53,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:53,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:59:53,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:59:53,208 INFO L87 Difference]: Start difference. First operand 61 states and 150 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:53,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:53,493 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2021-06-05 13:59:53,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:59:53,493 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 13:59:53,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:53,494 INFO L225 Difference]: With dead ends: 96 [2021-06-05 13:59:53,494 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 13:59:53,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 291.3ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:59:53,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 13:59:53,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 61. [2021-06-05 13:59:53,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.5) internal successors, (150), 60 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:53,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2021-06-05 13:59:53,496 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 14 [2021-06-05 13:59:53,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:53,496 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2021-06-05 13:59:53,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:53,496 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2021-06-05 13:59:53,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:59:53,496 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:53,497 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:53,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:53,705 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:53,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:53,705 INFO L82 PathProgramCache]: Analyzing trace with hash 2078979626, now seen corresponding path program 17 times [2021-06-05 13:59:53,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:53,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198695997] [2021-06-05 13:59:53,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:53,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:53,767 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:53,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:53,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198695997] [2021-06-05 13:59:53,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198695997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:53,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297908204] [2021-06-05 13:59:53,767 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 13:59:53,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:59:53,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:53,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:59:53,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:53,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:53,955 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 13:59:53,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:53,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:53,963 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 13:59:53,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:3 [2021-06-05 13:59:53,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:53,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297908204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:53,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:53,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 13:59:53,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211235690] [2021-06-05 13:59:53,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:59:53,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:53,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:59:53,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:59:53,969 INFO L87 Difference]: Start difference. First operand 61 states and 150 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:54,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:54,176 INFO L93 Difference]: Finished difference Result 89 states and 210 transitions. [2021-06-05 13:59:54,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:59:54,177 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 13:59:54,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:54,177 INFO L225 Difference]: With dead ends: 89 [2021-06-05 13:59:54,177 INFO L226 Difference]: Without dead ends: 75 [2021-06-05 13:59:54,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 158.6ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:59:54,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-05 13:59:54,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2021-06-05 13:59:54,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5970149253731343) internal successors, (174), 67 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:54,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 174 transitions. [2021-06-05 13:59:54,183 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 174 transitions. Word has length 14 [2021-06-05 13:59:54,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:54,183 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 174 transitions. [2021-06-05 13:59:54,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:54,183 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 174 transitions. [2021-06-05 13:59:54,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:59:54,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:54,185 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:54,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-06-05 13:59:54,406 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:54,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:54,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1472404310, now seen corresponding path program 18 times [2021-06-05 13:59:54,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:54,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432591810] [2021-06-05 13:59:54,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:54,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:54,466 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:54,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:54,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432591810] [2021-06-05 13:59:54,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432591810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:54,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370887610] [2021-06-05 13:59:54,467 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 13:59:54,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:59:54,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:54,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:59:54,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:54,631 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:54,631 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-05 13:59:54,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 13:59:54,658 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 13:59:54,658 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:54,671 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:54,671 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 13:59:54,680 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:54,696 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 13:59:54,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 13:59:54,697 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-05 13:59:54,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:54,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370887610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:54,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:54,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 13:59:54,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68691108] [2021-06-05 13:59:54,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:59:54,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:54,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:59:54,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:59:54,727 INFO L87 Difference]: Start difference. First operand 68 states and 174 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:54,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:54,970 INFO L93 Difference]: Finished difference Result 112 states and 263 transitions. [2021-06-05 13:59:54,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:59:54,970 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 13:59:54,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:54,971 INFO L225 Difference]: With dead ends: 112 [2021-06-05 13:59:54,971 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 13:59:54,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 222.2ms TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:59:54,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 13:59:54,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 68. [2021-06-05 13:59:54,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5970149253731343) internal successors, (174), 67 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:54,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 174 transitions. [2021-06-05 13:59:54,974 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 174 transitions. Word has length 14 [2021-06-05 13:59:54,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:54,974 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 174 transitions. [2021-06-05 13:59:54,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:54,974 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 174 transitions. [2021-06-05 13:59:54,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:59:54,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:54,974 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:55,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 13:59:55,181 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:55,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:55,181 INFO L82 PathProgramCache]: Analyzing trace with hash -621260178, now seen corresponding path program 19 times [2021-06-05 13:59:55,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:55,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013625725] [2021-06-05 13:59:55,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:55,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:55,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:55,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:55,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013625725] [2021-06-05 13:59:55,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013625725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:55,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707498545] [2021-06-05 13:59:55,241 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 13:59:55,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:55,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:59:55,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:55,413 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:55,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-05 13:59:55,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 13:59:55,433 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 13:59:55,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:55,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:55,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 13:59:55,454 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:55,471 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 13:59:55,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 13:59:55,472 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-05 13:59:55,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:55,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707498545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:55,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:55,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 13:59:55,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63650864] [2021-06-05 13:59:55,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:59:55,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:55,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:59:55,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:59:55,499 INFO L87 Difference]: Start difference. First operand 68 states and 174 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:55,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:55,682 INFO L93 Difference]: Finished difference Result 97 states and 233 transitions. [2021-06-05 13:59:55,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:59:55,682 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 13:59:55,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:55,682 INFO L225 Difference]: With dead ends: 97 [2021-06-05 13:59:55,682 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 13:59:55,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 221.1ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:59:55,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 13:59:55,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 68. [2021-06-05 13:59:55,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5970149253731343) internal successors, (174), 67 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:55,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 174 transitions. [2021-06-05 13:59:55,685 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 174 transitions. Word has length 14 [2021-06-05 13:59:55,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:55,685 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 174 transitions. [2021-06-05 13:59:55,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:55,685 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 174 transitions. [2021-06-05 13:59:55,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:59:55,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:55,686 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:55,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 13:59:55,889 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:55,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:55,889 INFO L82 PathProgramCache]: Analyzing trace with hash -5595862, now seen corresponding path program 20 times [2021-06-05 13:59:55,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:55,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470578185] [2021-06-05 13:59:55,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:55,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:55,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:55,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:55,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470578185] [2021-06-05 13:59:55,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470578185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:55,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134693201] [2021-06-05 13:59:55,943 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 13:59:55,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:59:55,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:55,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:59:55,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:56,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:56,116 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-05 13:59:56,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 13:59:56,157 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 13:59:56,158 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:56,172 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:56,172 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 13:59:56,180 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:56,197 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 13:59:56,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 13:59:56,198 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-05 13:59:56,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:56,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134693201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:56,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:56,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 13:59:56,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374437571] [2021-06-05 13:59:56,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:59:56,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:56,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:59:56,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:59:56,227 INFO L87 Difference]: Start difference. First operand 68 states and 174 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:56,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:56,540 INFO L93 Difference]: Finished difference Result 107 states and 254 transitions. [2021-06-05 13:59:56,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:59:56,540 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 13:59:56,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:56,541 INFO L225 Difference]: With dead ends: 107 [2021-06-05 13:59:56,541 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 13:59:56,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 323.3ms TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:59:56,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 13:59:56,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 68. [2021-06-05 13:59:56,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5970149253731343) internal successors, (174), 67 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:56,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 174 transitions. [2021-06-05 13:59:56,553 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 174 transitions. Word has length 14 [2021-06-05 13:59:56,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:56,553 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 174 transitions. [2021-06-05 13:59:56,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:56,553 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 174 transitions. [2021-06-05 13:59:56,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:59:56,553 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:56,553 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:56,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:56,769 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:56,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:56,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1900128750, now seen corresponding path program 21 times [2021-06-05 13:59:56,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:56,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772630900] [2021-06-05 13:59:56,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:56,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:56,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:56,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:56,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772630900] [2021-06-05 13:59:56,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772630900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:56,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600991724] [2021-06-05 13:59:56,827 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 13:59:56,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:59:56,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:56,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 13:59:56,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:57,007 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:57,007 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 64 [2021-06-05 13:59:57,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 13:59:57,028 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 13:59:57,029 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:57,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:57,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-06-05 13:59:57,048 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:57,064 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 13:59:57,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 13:59:57,065 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:79, output treesize:15 [2021-06-05 13:59:57,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:57,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600991724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:57,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:57,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 13:59:57,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54565024] [2021-06-05 13:59:57,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:59:57,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:57,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:59:57,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:59:57,090 INFO L87 Difference]: Start difference. First operand 68 states and 174 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:57,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:57,379 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2021-06-05 13:59:57,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:59:57,380 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 13:59:57,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:57,380 INFO L225 Difference]: With dead ends: 112 [2021-06-05 13:59:57,380 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 13:59:57,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 313.6ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:59:57,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 13:59:57,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2021-06-05 13:59:57,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.5652173913043477) internal successors, (177), 69 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:57,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2021-06-05 13:59:57,383 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 14 [2021-06-05 13:59:57,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:57,383 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2021-06-05 13:59:57,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:57,383 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2021-06-05 13:59:57,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:59:57,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:57,383 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:57,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 13:59:57,597 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:57,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:57,597 INFO L82 PathProgramCache]: Analyzing trace with hash -336763768, now seen corresponding path program 22 times [2021-06-05 13:59:57,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:57,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817299859] [2021-06-05 13:59:57,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:57,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:57,687 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:57,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:57,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817299859] [2021-06-05 13:59:57,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817299859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:57,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653495352] [2021-06-05 13:59:57,687 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 13:59:57,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:59:57,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:57,710 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 13:59:57,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:57,868 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:57,868 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 13:59:57,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:57,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:57,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:59:57,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 13:59:57,914 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:57,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653495352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:57,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:57,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:59:57,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86940876] [2021-06-05 13:59:57,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:59:57,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:57,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:59:57,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:59:57,915 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:58,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:58,097 INFO L93 Difference]: Finished difference Result 95 states and 224 transitions. [2021-06-05 13:59:58,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:59:58,097 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 13:59:58,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:58,098 INFO L225 Difference]: With dead ends: 95 [2021-06-05 13:59:58,098 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 13:59:58,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 193.1ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:59:58,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 13:59:58,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2021-06-05 13:59:58,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.5416666666666665) internal successors, (183), 72 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:58,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2021-06-05 13:59:58,103 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 15 [2021-06-05 13:59:58,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:58,104 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2021-06-05 13:59:58,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:58,104 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2021-06-05 13:59:58,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:59:58,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:58,104 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:58,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:58,327 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:58,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:58,327 INFO L82 PathProgramCache]: Analyzing trace with hash 515569656, now seen corresponding path program 23 times [2021-06-05 13:59:58,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:58,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586755356] [2021-06-05 13:59:58,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:58,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:58,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:58,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586755356] [2021-06-05 13:59:58,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586755356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:58,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330934349] [2021-06-05 13:59:58,416 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 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 13:59:58,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:59:58,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:58,441 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 13:59:58,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:58,603 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:58,604 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 13:59:58,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:58,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:58,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:59:58,624 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 13:59:58,628 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:58,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330934349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:58,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:58,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:59:58,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010661780] [2021-06-05 13:59:58,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:59:58,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:58,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:59:58,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:59:58,630 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:58,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:58,899 INFO L93 Difference]: Finished difference Result 90 states and 217 transitions. [2021-06-05 13:59:58,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:59:58,900 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 13:59:58,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:58,900 INFO L225 Difference]: With dead ends: 90 [2021-06-05 13:59:58,900 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 13:59:58,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 263.9ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:59:58,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 13:59:58,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2021-06-05 13:59:58,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5342465753424657) internal successors, (185), 73 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:58,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2021-06-05 13:59:58,903 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 15 [2021-06-05 13:59:58,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:58,903 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2021-06-05 13:59:58,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:58,903 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2021-06-05 13:59:58,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:59:58,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:58,903 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:59,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:59,104 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:59,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:59,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1259153016, now seen corresponding path program 24 times [2021-06-05 13:59:59,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:59,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769731142] [2021-06-05 13:59:59,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:59,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:59,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:59,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769731142] [2021-06-05 13:59:59,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769731142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:59,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838279622] [2021-06-05 13:59:59,184 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 13:59:59,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:59:59,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:59,207 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 13:59:59,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:59,353 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:59,353 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 13:59:59,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:59,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:59,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 13:59:59,513 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 13:59:59,532 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 13:59:59,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 13:59:59,534 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 13:59:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:59,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838279622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:59,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:59,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 13:59:59,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266387026] [2021-06-05 13:59:59,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:59:59,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:59,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:59:59,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:59:59,568 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:59,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:59,832 INFO L93 Difference]: Finished difference Result 112 states and 256 transitions. [2021-06-05 13:59:59,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:59:59,833 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 13:59:59,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:59,833 INFO L225 Difference]: With dead ends: 112 [2021-06-05 13:59:59,833 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 13:59:59,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 203.2ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:59:59,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 13:59:59,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 74. [2021-06-05 13:59:59,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5342465753424657) internal successors, (185), 73 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:59,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2021-06-05 13:59:59,836 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 15 [2021-06-05 13:59:59,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:59,836 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2021-06-05 13:59:59,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:59,836 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2021-06-05 13:59:59,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:59:59,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:59,837 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:00,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-05 14:00:00,037 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:00,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:00,037 INFO L82 PathProgramCache]: Analyzing trace with hash 49437346, now seen corresponding path program 25 times [2021-06-05 14:00:00,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:00,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039339272] [2021-06-05 14:00:00,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:00,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:00,112 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:00,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:00,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039339272] [2021-06-05 14:00:00,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039339272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:00,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106309124] [2021-06-05 14:00:00,112 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 14:00:00,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:00,134 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:00:00,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:00,274 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:00,274 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:00:00,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:00,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:00,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:00:00,398 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 14:00:00,419 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:00:00,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:00:00,420 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 14:00:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:00,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106309124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:00,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:00,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 14:00:00,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500092459] [2021-06-05 14:00:00,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:00:00,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:00,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:00:00,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:00,452 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:00,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:00,759 INFO L93 Difference]: Finished difference Result 128 states and 283 transitions. [2021-06-05 14:00:00,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:00:00,760 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:00:00,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:00,760 INFO L225 Difference]: With dead ends: 128 [2021-06-05 14:00:00,760 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 14:00:00,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 259.8ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:00:00,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 14:00:00,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 77. [2021-06-05 14:00:00,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.539473684210526) internal successors, (193), 76 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:00,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2021-06-05 14:00:00,763 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 15 [2021-06-05 14:00:00,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:00,763 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2021-06-05 14:00:00,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:00,764 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2021-06-05 14:00:00,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:00:00,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:00,764 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:00,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-06-05 14:00:00,973 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:00,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:00,973 INFO L82 PathProgramCache]: Analyzing trace with hash -611826437, now seen corresponding path program 26 times [2021-06-05 14:00:00,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:00,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732769360] [2021-06-05 14:00:00,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:01,021 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:01,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:01,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732769360] [2021-06-05 14:00:01,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732769360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:01,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825268946] [2021-06-05 14:00:01,022 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 14:00:01,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:01,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:01,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:00:01,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:01,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:01,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825268946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:01,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:01,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 14:00:01,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328459463] [2021-06-05 14:00:01,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:00:01,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:01,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:00:01,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:00:01,097 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:01,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:01,136 INFO L93 Difference]: Finished difference Result 163 states and 339 transitions. [2021-06-05 14:00:01,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:00:01,137 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 14:00:01,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:01,138 INFO L225 Difference]: With dead ends: 163 [2021-06-05 14:00:01,138 INFO L226 Difference]: Without dead ends: 163 [2021-06-05 14:00:01,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:00:01,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-06-05 14:00:01,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 82. [2021-06-05 14:00:01,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.617283950617284) internal successors, (212), 81 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:01,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 212 transitions. [2021-06-05 14:00:01,141 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 212 transitions. Word has length 15 [2021-06-05 14:00:01,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:01,142 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 212 transitions. [2021-06-05 14:00:01,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:01,142 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 212 transitions. [2021-06-05 14:00:01,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:00:01,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:01,142 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:01,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-06-05 14:00:01,360 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:01,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:01,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1007434568, now seen corresponding path program 27 times [2021-06-05 14:00:01,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:01,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934047528] [2021-06-05 14:00:01,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:01,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:01,473 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:01,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:01,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934047528] [2021-06-05 14:00:01,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934047528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:01,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149137405] [2021-06-05 14:00:01,473 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 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 14:00:01,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:00:01,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:01,503 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:00:01,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:01,701 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:01,702 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:00:01,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:01,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:01,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:01,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 14:00:01,734 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:01,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149137405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:01,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:01,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:00:01,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849705598] [2021-06-05 14:00:01,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:00:01,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:01,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:00:01,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:00:01,735 INFO L87 Difference]: Start difference. First operand 82 states and 212 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:02,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:02,029 INFO L93 Difference]: Finished difference Result 95 states and 233 transitions. [2021-06-05 14:00:02,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:00:02,030 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:00:02,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:02,030 INFO L225 Difference]: With dead ends: 95 [2021-06-05 14:00:02,030 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 14:00:02,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 340.7ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:00:02,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 14:00:02,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2021-06-05 14:00:02,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.5925925925925926) internal successors, (210), 81 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:02,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 210 transitions. [2021-06-05 14:00:02,033 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 210 transitions. Word has length 15 [2021-06-05 14:00:02,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:02,033 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 210 transitions. [2021-06-05 14:00:02,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:02,033 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 210 transitions. [2021-06-05 14:00:02,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:00:02,033 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:02,033 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:02,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:02,250 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:02,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:02,251 INFO L82 PathProgramCache]: Analyzing trace with hash -263851208, now seen corresponding path program 28 times [2021-06-05 14:00:02,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:02,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770217737] [2021-06-05 14:00:02,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:02,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:02,386 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:02,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:02,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770217737] [2021-06-05 14:00:02,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770217737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:02,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964099446] [2021-06-05 14:00:02,386 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 14:00:02,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:02,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:02,421 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:00:02,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:02,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:02,564 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:00:02,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:02,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:02,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:00:02,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 14:00:02,742 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:00:02,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:00:02,742 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 14:00:02,774 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:02,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964099446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:02,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:02,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:00:02,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419159482] [2021-06-05 14:00:02,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:00:02,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:02,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:00:02,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:00:02,776 INFO L87 Difference]: Start difference. First operand 82 states and 210 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:03,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:03,146 INFO L93 Difference]: Finished difference Result 118 states and 273 transitions. [2021-06-05 14:00:03,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:00:03,146 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:00:03,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:03,147 INFO L225 Difference]: With dead ends: 118 [2021-06-05 14:00:03,147 INFO L226 Difference]: Without dead ends: 108 [2021-06-05 14:00:03,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 317.9ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:00:03,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-05 14:00:03,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2021-06-05 14:00:03,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.5925925925925926) internal successors, (210), 81 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:03,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 210 transitions. [2021-06-05 14:00:03,150 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 210 transitions. Word has length 15 [2021-06-05 14:00:03,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:03,150 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 210 transitions. [2021-06-05 14:00:03,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:03,150 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 210 transitions. [2021-06-05 14:00:03,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:00:03,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:03,151 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:03,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-06-05 14:00:03,361 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:03,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:03,361 INFO L82 PathProgramCache]: Analyzing trace with hash 587292924, now seen corresponding path program 29 times [2021-06-05 14:00:03,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:03,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824912362] [2021-06-05 14:00:03,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:03,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:03,455 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:03,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:03,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824912362] [2021-06-05 14:00:03,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824912362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:03,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833402596] [2021-06-05 14:00:03,455 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) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:03,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:00:03,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:03,483 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:00:03,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:03,739 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:03,739 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:00:03,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:04,152 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-06-05 14:00:04,153 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:04,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:00:04,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 14:00:04,220 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:00:04,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:00:04,221 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 14:00:04,249 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:04,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833402596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:04,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:04,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:00:04,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643347041] [2021-06-05 14:00:04,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:00:04,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:04,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:00:04,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:00:04,250 INFO L87 Difference]: Start difference. First operand 82 states and 210 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:04,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:04,623 INFO L93 Difference]: Finished difference Result 140 states and 313 transitions. [2021-06-05 14:00:04,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:00:04,624 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:00:04,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:04,625 INFO L225 Difference]: With dead ends: 140 [2021-06-05 14:00:04,625 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 14:00:04,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 319.9ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:00:04,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 14:00:04,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 82. [2021-06-05 14:00:04,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.5925925925925926) internal successors, (210), 81 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:04,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 210 transitions. [2021-06-05 14:00:04,647 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 210 transitions. Word has length 15 [2021-06-05 14:00:04,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:04,647 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 210 transitions. [2021-06-05 14:00:04,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:04,647 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 210 transitions. [2021-06-05 14:00:04,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:00:04,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:04,647 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:04,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-06-05 14:00:04,870 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:04,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:04,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1202957240, now seen corresponding path program 30 times [2021-06-05 14:00:04,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:04,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582587008] [2021-06-05 14:00:04,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:04,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:04,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:04,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:04,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582587008] [2021-06-05 14:00:04,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582587008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:04,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179199084] [2021-06-05 14:00:04,998 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 14:00:05,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:00:05,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:05,024 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:00:05,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:05,252 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:05,252 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:00:05,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:05,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:05,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:00:05,413 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 14:00:05,434 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:00:05,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:00:05,435 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 14:00:05,464 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:05,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179199084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:05,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:05,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:00:05,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530240155] [2021-06-05 14:00:05,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:00:05,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:05,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:00:05,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:00:05,466 INFO L87 Difference]: Start difference. First operand 82 states and 210 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:06,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:06,018 INFO L93 Difference]: Finished difference Result 157 states and 342 transitions. [2021-06-05 14:00:06,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:00:06,019 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:00:06,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:06,020 INFO L225 Difference]: With dead ends: 157 [2021-06-05 14:00:06,020 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 14:00:06,020 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 513.0ms TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:00:06,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 14:00:06,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 84. [2021-06-05 14:00:06,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.5903614457831323) internal successors, (215), 83 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:06,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 215 transitions. [2021-06-05 14:00:06,022 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 215 transitions. Word has length 15 [2021-06-05 14:00:06,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:06,022 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 215 transitions. [2021-06-05 14:00:06,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:06,022 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 215 transitions. [2021-06-05 14:00:06,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:00:06,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:06,022 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:06,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-06-05 14:00:06,223 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:06,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:06,224 INFO L82 PathProgramCache]: Analyzing trace with hash -2134830661, now seen corresponding path program 31 times [2021-06-05 14:00:06,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:06,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574284620] [2021-06-05 14:00:06,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:06,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:06,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:06,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:06,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574284620] [2021-06-05 14:00:06,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574284620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:06,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653635245] [2021-06-05 14:00:06,271 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 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 14:00:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:06,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:00:06,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:06,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:06,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653635245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:06,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:06,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 14:00:06,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021006113] [2021-06-05 14:00:06,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:00:06,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:06,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:00:06,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:00:06,345 INFO L87 Difference]: Start difference. First operand 84 states and 215 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:06,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:06,479 INFO L93 Difference]: Finished difference Result 200 states and 410 transitions. [2021-06-05 14:00:06,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:00:06,480 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 14:00:06,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:06,480 INFO L225 Difference]: With dead ends: 200 [2021-06-05 14:00:06,481 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 14:00:06,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:00:06,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 14:00:06,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 93. [2021-06-05 14:00:06,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6739130434782608) internal successors, (246), 92 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:06,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 246 transitions. [2021-06-05 14:00:06,498 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 246 transitions. Word has length 15 [2021-06-05 14:00:06,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:06,500 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 246 transitions. [2021-06-05 14:00:06,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:06,500 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 246 transitions. [2021-06-05 14:00:06,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:00:06,501 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:06,501 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:06,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:06,702 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:06,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:06,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1513780834, now seen corresponding path program 32 times [2021-06-05 14:00:06,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:06,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357963699] [2021-06-05 14:00:06,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:06,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:06,827 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:06,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:06,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357963699] [2021-06-05 14:00:06,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357963699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:06,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921824152] [2021-06-05 14:00:06,827 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 14:00:06,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:06,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:06,851 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:00:06,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:07,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:07,024 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:00:07,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:07,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:07,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:07,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 14:00:07,052 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:07,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921824152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:07,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:07,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:00:07,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239699404] [2021-06-05 14:00:07,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:00:07,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:07,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:00:07,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:00:07,055 INFO L87 Difference]: Start difference. First operand 93 states and 246 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:07,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:07,293 INFO L93 Difference]: Finished difference Result 107 states and 271 transitions. [2021-06-05 14:00:07,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:00:07,294 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:00:07,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:07,295 INFO L225 Difference]: With dead ends: 107 [2021-06-05 14:00:07,295 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 14:00:07,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 311.9ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:00:07,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 14:00:07,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2021-06-05 14:00:07,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6630434782608696) internal successors, (245), 92 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:07,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 245 transitions. [2021-06-05 14:00:07,297 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 245 transitions. Word has length 15 [2021-06-05 14:00:07,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:07,297 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 245 transitions. [2021-06-05 14:00:07,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:07,298 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 245 transitions. [2021-06-05 14:00:07,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:00:07,298 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:07,298 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:07,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:07,513 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:07,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:07,513 INFO L82 PathProgramCache]: Analyzing trace with hash -770197474, now seen corresponding path program 33 times [2021-06-05 14:00:07,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:07,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398650417] [2021-06-05 14:00:07,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:07,630 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:07,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:07,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398650417] [2021-06-05 14:00:07,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398650417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:07,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251049304] [2021-06-05 14:00:07,631 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 14:00:07,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:00:07,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:07,666 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:00:07,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:07,824 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:07,824 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:00:07,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:07,891 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:07,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:00:08,013 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 14:00:08,034 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:00:08,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:00:08,035 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 14:00:08,066 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:08,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251049304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:08,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:08,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:00:08,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271710915] [2021-06-05 14:00:08,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:00:08,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:08,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:00:08,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:00:08,068 INFO L87 Difference]: Start difference. First operand 93 states and 245 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:08,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:08,417 INFO L93 Difference]: Finished difference Result 135 states and 326 transitions. [2021-06-05 14:00:08,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:00:08,418 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:00:08,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:08,418 INFO L225 Difference]: With dead ends: 135 [2021-06-05 14:00:08,418 INFO L226 Difference]: Without dead ends: 125 [2021-06-05 14:00:08,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 368.3ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:00:08,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-05 14:00:08,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 93. [2021-06-05 14:00:08,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6630434782608696) internal successors, (245), 92 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:08,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 245 transitions. [2021-06-05 14:00:08,421 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 245 transitions. Word has length 15 [2021-06-05 14:00:08,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:08,421 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 245 transitions. [2021-06-05 14:00:08,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:08,422 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 245 transitions. [2021-06-05 14:00:08,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:00:08,422 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:08,422 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:08,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:08,637 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:08,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:08,637 INFO L82 PathProgramCache]: Analyzing trace with hash 80946658, now seen corresponding path program 34 times [2021-06-05 14:00:08,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:08,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101534273] [2021-06-05 14:00:08,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:08,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:08,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:08,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:08,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101534273] [2021-06-05 14:00:08,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101534273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:08,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754597494] [2021-06-05 14:00:08,722 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 14:00:08,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:08,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:08,751 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:00:08,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:08,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:08,907 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:00:08,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:08,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:08,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:00:09,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 14:00:09,063 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:00:09,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:00:09,064 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 14:00:09,093 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:09,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754597494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:09,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:09,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:00:09,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832636846] [2021-06-05 14:00:09,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:00:09,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:09,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:00:09,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:00:09,094 INFO L87 Difference]: Start difference. First operand 93 states and 245 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:09,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:09,510 INFO L93 Difference]: Finished difference Result 158 states and 363 transitions. [2021-06-05 14:00:09,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:00:09,511 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:00:09,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:09,511 INFO L225 Difference]: With dead ends: 158 [2021-06-05 14:00:09,511 INFO L226 Difference]: Without dead ends: 148 [2021-06-05 14:00:09,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 373.7ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:00:09,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-05 14:00:09,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 93. [2021-06-05 14:00:09,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6630434782608696) internal successors, (245), 92 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:09,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 245 transitions. [2021-06-05 14:00:09,515 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 245 transitions. Word has length 15 [2021-06-05 14:00:09,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:09,515 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 245 transitions. [2021-06-05 14:00:09,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:09,515 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 245 transitions. [2021-06-05 14:00:09,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:00:09,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:09,516 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:09,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-06-05 14:00:09,730 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:09,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:09,731 INFO L82 PathProgramCache]: Analyzing trace with hash 696610974, now seen corresponding path program 35 times [2021-06-05 14:00:09,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:09,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444897593] [2021-06-05 14:00:09,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:09,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:10,681 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:10,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:10,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444897593] [2021-06-05 14:00:10,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444897593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:10,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184486007] [2021-06-05 14:00:10,681 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 14:00:10,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:00:10,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:10,716 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:00:10,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:11,199 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-06-05 14:00:11,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:11,199 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:00:11,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:11,256 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:11,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:00:11,353 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 14:00:11,375 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:00:11,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:00:11,376 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 14:00:11,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:11,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184486007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:11,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:11,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:00:11,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8618721] [2021-06-05 14:00:11,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:00:11,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:11,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:00:11,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:00:11,434 INFO L87 Difference]: Start difference. First operand 93 states and 245 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:11,896 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-06-05 14:00:12,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:12,243 INFO L93 Difference]: Finished difference Result 169 states and 379 transitions. [2021-06-05 14:00:12,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:00:12,243 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:00:12,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:12,244 INFO L225 Difference]: With dead ends: 169 [2021-06-05 14:00:12,244 INFO L226 Difference]: Without dead ends: 159 [2021-06-05 14:00:12,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1727.3ms TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:00:12,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-05 14:00:12,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 93. [2021-06-05 14:00:12,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.6630434782608696) internal successors, (245), 92 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:12,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 245 transitions. [2021-06-05 14:00:12,248 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 245 transitions. Word has length 15 [2021-06-05 14:00:12,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:12,249 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 245 transitions. [2021-06-05 14:00:12,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:12,249 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 245 transitions. [2021-06-05 14:00:12,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:00:12,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:12,249 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:12,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable574 [2021-06-05 14:00:12,474 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:12,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:12,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1692631710, now seen corresponding path program 36 times [2021-06-05 14:00:12,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:12,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763213547] [2021-06-05 14:00:12,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:12,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:12,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:12,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:12,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763213547] [2021-06-05 14:00:12,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763213547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:12,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545655605] [2021-06-05 14:00:12,715 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 14:00:12,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:00:12,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:12,759 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:00:12,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:13,089 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 14:00:13,937 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-06-05 14:00:14,477 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-06-05 14:00:15,029 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-06-05 14:00:15,309 INFO L244 Elim1Store]: Index analysis took 144 ms [2021-06-05 14:00:15,709 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-06-05 14:00:15,709 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:15,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:00:15,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:16,565 WARN L205 SmtUtils]: Spent 611.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-06-05 14:00:16,565 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:16,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:00:17,012 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 14:00:17,097 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:00:17,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:00:17,098 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 14:00:17,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:17,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545655605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:17,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:17,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:00:17,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291278270] [2021-06-05 14:00:17,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:00:17,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:17,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:00:17,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:00:17,132 INFO L87 Difference]: Start difference. First operand 93 states and 245 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:17,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:17,665 INFO L93 Difference]: Finished difference Result 140 states and 323 transitions. [2021-06-05 14:00:17,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:00:17,666 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:00:17,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:17,670 INFO L225 Difference]: With dead ends: 140 [2021-06-05 14:00:17,671 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 14:00:17,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 2553.1ms TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:00:17,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 14:00:17,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 95. [2021-06-05 14:00:17,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.6382978723404253) internal successors, (248), 94 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:17,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 248 transitions. [2021-06-05 14:00:17,687 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 248 transitions. Word has length 15 [2021-06-05 14:00:17,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:17,687 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 248 transitions. [2021-06-05 14:00:17,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:17,688 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 248 transitions. [2021-06-05 14:00:17,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:00:17,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:17,688 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:17,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-06-05 14:00:17,889 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:17,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:17,889 INFO L82 PathProgramCache]: Analyzing trace with hash -2103321349, now seen corresponding path program 37 times [2021-06-05 14:00:17,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:17,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556989858] [2021-06-05 14:00:17,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:17,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:17,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:17,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556989858] [2021-06-05 14:00:17,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556989858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:17,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70654143] [2021-06-05 14:00:17,928 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 14:00:17,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:17,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:00:17,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:18,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:18,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70654143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:18,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:18,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 14:00:18,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800860298] [2021-06-05 14:00:18,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:00:18,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:18,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:00:18,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:00:18,028 INFO L87 Difference]: Start difference. First operand 95 states and 248 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:18,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:18,133 INFO L93 Difference]: Finished difference Result 170 states and 379 transitions. [2021-06-05 14:00:18,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:00:18,133 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 14:00:18,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:18,134 INFO L225 Difference]: With dead ends: 170 [2021-06-05 14:00:18,134 INFO L226 Difference]: Without dead ends: 170 [2021-06-05 14:00:18,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:00:18,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-06-05 14:00:18,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 102. [2021-06-05 14:00:18,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.6831683168316833) internal successors, (271), 101 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:18,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 271 transitions. [2021-06-05 14:00:18,158 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 271 transitions. Word has length 15 [2021-06-05 14:00:18,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:18,158 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 271 transitions. [2021-06-05 14:00:18,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:18,158 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 271 transitions. [2021-06-05 14:00:18,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:00:18,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:18,159 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:18,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable646 [2021-06-05 14:00:18,381 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:18,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:18,381 INFO L82 PathProgramCache]: Analyzing trace with hash -30645896, now seen corresponding path program 38 times [2021-06-05 14:00:18,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:18,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050978119] [2021-06-05 14:00:18,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:18,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:18,490 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:18,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:18,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050978119] [2021-06-05 14:00:18,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050978119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:18,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457957687] [2021-06-05 14:00:18,491 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 14:00:18,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:18,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:18,520 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:00:18,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:18,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:18,686 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:00:18,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:18,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:18,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:18,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 14:00:18,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:18,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457957687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:18,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:18,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:00:18,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601630901] [2021-06-05 14:00:18,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:00:18,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:18,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:00:18,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:00:18,717 INFO L87 Difference]: Start difference. First operand 102 states and 271 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:18,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:18,926 INFO L93 Difference]: Finished difference Result 120 states and 308 transitions. [2021-06-05 14:00:18,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:00:18,927 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:00:18,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:18,928 INFO L225 Difference]: With dead ends: 120 [2021-06-05 14:00:18,928 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 14:00:18,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 246.3ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:00:18,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 14:00:18,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 103. [2021-06-05 14:00:18,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.6862745098039214) internal successors, (274), 102 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:18,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 274 transitions. [2021-06-05 14:00:18,932 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 274 transitions. Word has length 15 [2021-06-05 14:00:18,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:18,932 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 274 transitions. [2021-06-05 14:00:18,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:18,932 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 274 transitions. [2021-06-05 14:00:18,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:00:18,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:18,932 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:19,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable647 [2021-06-05 14:00:19,151 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:19,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:19,151 INFO L82 PathProgramCache]: Analyzing trace with hash 712937464, now seen corresponding path program 39 times [2021-06-05 14:00:19,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:19,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271226035] [2021-06-05 14:00:19,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:19,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:19,259 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:19,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:19,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271226035] [2021-06-05 14:00:19,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271226035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:19,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223495347] [2021-06-05 14:00:19,260 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 14:00:19,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:00:19,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:19,294 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:00:19,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:19,444 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:19,444 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:00:19,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:19,519 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:19,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:00:19,572 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 14:00:19,593 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:00:19,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:00:19,594 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 14:00:19,625 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:19,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223495347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:19,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:19,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:00:19,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209960994] [2021-06-05 14:00:19,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:00:19,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:19,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:00:19,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:00:19,627 INFO L87 Difference]: Start difference. First operand 103 states and 274 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:20,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:20,006 INFO L93 Difference]: Finished difference Result 154 states and 382 transitions. [2021-06-05 14:00:20,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:00:20,007 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:00:20,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:20,008 INFO L225 Difference]: With dead ends: 154 [2021-06-05 14:00:20,008 INFO L226 Difference]: Without dead ends: 144 [2021-06-05 14:00:20,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 320.3ms TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:00:20,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-05 14:00:20,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 102. [2021-06-05 14:00:20,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.6831683168316833) internal successors, (271), 101 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:20,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 271 transitions. [2021-06-05 14:00:20,027 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 271 transitions. Word has length 15 [2021-06-05 14:00:20,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:20,027 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 271 transitions. [2021-06-05 14:00:20,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:20,027 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 271 transitions. [2021-06-05 14:00:20,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:00:20,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:20,028 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:20,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable659,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:20,229 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:20,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:20,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1564081596, now seen corresponding path program 40 times [2021-06-05 14:00:20,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:20,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84318018] [2021-06-05 14:00:20,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:20,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:20,321 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:20,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:20,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84318018] [2021-06-05 14:00:20,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84318018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:20,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491020494] [2021-06-05 14:00:20,322 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 14:00:20,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:20,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:20,357 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:00:20,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:20,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:20,516 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:00:20,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:20,576 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:20,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:00:20,668 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 14:00:20,689 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:00:20,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:00:20,690 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 14:00:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:20,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491020494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:20,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:20,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:00:20,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501000977] [2021-06-05 14:00:20,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:00:20,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:20,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:00:20,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:00:20,733 INFO L87 Difference]: Start difference. First operand 102 states and 271 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:21,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:21,288 INFO L93 Difference]: Finished difference Result 176 states and 417 transitions. [2021-06-05 14:00:21,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:00:21,288 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:00:21,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:21,289 INFO L225 Difference]: With dead ends: 176 [2021-06-05 14:00:21,289 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 14:00:21,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 482.0ms TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:00:21,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 14:00:21,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 103. [2021-06-05 14:00:21,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.6862745098039214) internal successors, (274), 102 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:21,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 274 transitions. [2021-06-05 14:00:21,292 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 274 transitions. Word has length 15 [2021-06-05 14:00:21,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:21,292 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 274 transitions. [2021-06-05 14:00:21,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:21,293 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 274 transitions. [2021-06-05 14:00:21,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:00:21,293 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:21,293 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:21,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable692,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:21,510 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:21,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:21,511 INFO L82 PathProgramCache]: Analyzing trace with hash 902817813, now seen corresponding path program 41 times [2021-06-05 14:00:21,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:21,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235372606] [2021-06-05 14:00:21,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:21,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:21,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:21,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:21,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235372606] [2021-06-05 14:00:21,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235372606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:21,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657479508] [2021-06-05 14:00:21,579 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 14:00:21,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:00:21,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:21,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:00:21,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:21,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:21,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657479508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:21,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:21,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 14:00:21,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359106153] [2021-06-05 14:00:21,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:00:21,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:21,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:00:21,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:00:21,704 INFO L87 Difference]: Start difference. First operand 103 states and 274 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:21,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:21,741 INFO L93 Difference]: Finished difference Result 196 states and 448 transitions. [2021-06-05 14:00:21,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:00:21,741 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 14:00:21,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:21,742 INFO L225 Difference]: With dead ends: 196 [2021-06-05 14:00:21,742 INFO L226 Difference]: Without dead ends: 196 [2021-06-05 14:00:21,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:00:21,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-06-05 14:00:21,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 121. [2021-06-05 14:00:21,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.7666666666666666) internal successors, (332), 120 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:21,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 332 transitions. [2021-06-05 14:00:21,745 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 332 transitions. Word has length 15 [2021-06-05 14:00:21,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:21,745 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 332 transitions. [2021-06-05 14:00:21,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:21,745 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 332 transitions. [2021-06-05 14:00:21,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:00:21,746 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:21,746 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:21,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable732 [2021-06-05 14:00:21,947 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:21,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:21,947 INFO L82 PathProgramCache]: Analyzing trace with hash -2115221384, now seen corresponding path program 42 times [2021-06-05 14:00:21,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:21,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709673202] [2021-06-05 14:00:21,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:21,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:22,117 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:22,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:22,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709673202] [2021-06-05 14:00:22,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709673202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:22,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639312623] [2021-06-05 14:00:22,117 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 14:00:22,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:00:22,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:22,149 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:00:22,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:22,351 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:22,352 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:00:22,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:22,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:22,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:00:22,507 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 14:00:22,527 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:00:22,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:00:22,528 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 14:00:22,556 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:22,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639312623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:22,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:22,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:00:22,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129403155] [2021-06-05 14:00:22,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:00:22,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:22,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:00:22,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:00:22,559 INFO L87 Difference]: Start difference. First operand 121 states and 332 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:23,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:23,393 INFO L93 Difference]: Finished difference Result 209 states and 492 transitions. [2021-06-05 14:00:23,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:00:23,394 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:00:23,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:23,395 INFO L225 Difference]: With dead ends: 209 [2021-06-05 14:00:23,395 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 14:00:23,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 693.2ms TimeCoverageRelationStatistics Valid=194, Invalid=862, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:00:23,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 14:00:23,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 120. [2021-06-05 14:00:23,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.764705882352941) internal successors, (329), 119 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:23,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 329 transitions. [2021-06-05 14:00:23,406 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 329 transitions. Word has length 15 [2021-06-05 14:00:23,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:23,407 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 329 transitions. [2021-06-05 14:00:23,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:23,407 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 329 transitions. [2021-06-05 14:00:23,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:00:23,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:23,407 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:23,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable733 [2021-06-05 14:00:23,637 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:23,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:23,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1158041989, now seen corresponding path program 43 times [2021-06-05 14:00:23,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:23,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269445224] [2021-06-05 14:00:23,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:23,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:23,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:23,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269445224] [2021-06-05 14:00:23,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269445224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:23,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309894319] [2021-06-05 14:00:23,683 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 14:00:23,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:23,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:00:23,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:24,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:24,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309894319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:24,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:24,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 14:00:24,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363412208] [2021-06-05 14:00:24,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:00:24,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:24,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:00:24,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:00:24,063 INFO L87 Difference]: Start difference. First operand 120 states and 329 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:24,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:24,137 INFO L93 Difference]: Finished difference Result 219 states and 478 transitions. [2021-06-05 14:00:24,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:00:24,137 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 14:00:24,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:24,138 INFO L225 Difference]: With dead ends: 219 [2021-06-05 14:00:24,138 INFO L226 Difference]: Without dead ends: 219 [2021-06-05 14:00:24,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 176.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:00:24,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-05 14:00:24,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 114. [2021-06-05 14:00:24,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.743362831858407) internal successors, (310), 113 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:24,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 310 transitions. [2021-06-05 14:00:24,160 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 310 transitions. Word has length 15 [2021-06-05 14:00:24,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:24,160 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 310 transitions. [2021-06-05 14:00:24,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:24,160 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 310 transitions. [2021-06-05 14:00:24,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:00:24,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:24,160 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:24,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable780,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:24,361 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:24,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:24,361 INFO L82 PathProgramCache]: Analyzing trace with hash -209496772, now seen corresponding path program 44 times [2021-06-05 14:00:24,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:24,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789050427] [2021-06-05 14:00:24,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:24,441 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:24,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:24,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789050427] [2021-06-05 14:00:24,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789050427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:24,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746188482] [2021-06-05 14:00:24,441 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 14:00:24,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:24,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:24,472 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:00:24,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:24,654 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:24,655 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:00:24,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:24,724 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:24,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:00:24,850 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 14:00:24,886 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:00:24,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:00:24,887 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 14:00:24,916 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:24,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746188482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:24,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:24,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:00:24,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576072186] [2021-06-05 14:00:24,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:00:24,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:24,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:00:24,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:00:24,918 INFO L87 Difference]: Start difference. First operand 114 states and 310 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:25,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:25,486 INFO L93 Difference]: Finished difference Result 172 states and 409 transitions. [2021-06-05 14:00:25,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:00:25,487 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:00:25,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:25,488 INFO L225 Difference]: With dead ends: 172 [2021-06-05 14:00:25,488 INFO L226 Difference]: Without dead ends: 162 [2021-06-05 14:00:25,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 608.6ms TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:00:25,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-05 14:00:25,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 114. [2021-06-05 14:00:25,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.743362831858407) internal successors, (310), 113 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:25,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 310 transitions. [2021-06-05 14:00:25,490 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 310 transitions. Word has length 15 [2021-06-05 14:00:25,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:25,490 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 310 transitions. [2021-06-05 14:00:25,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:25,491 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 310 transitions. [2021-06-05 14:00:25,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:00:25,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:25,491 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:25,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:25,714 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:25,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:25,714 INFO L82 PathProgramCache]: Analyzing trace with hash -620186411, now seen corresponding path program 45 times [2021-06-05 14:00:25,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:25,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980110362] [2021-06-05 14:00:25,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:25,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:25,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:25,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980110362] [2021-06-05 14:00:25,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980110362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:25,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246875649] [2021-06-05 14:00:25,769 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 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 14:00:25,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:00:25,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:25,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:00:25,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:25,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:25,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246875649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:25,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:25,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 14:00:25,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619608997] [2021-06-05 14:00:25,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:00:25,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:25,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:00:25,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:00:25,838 INFO L87 Difference]: Start difference. First operand 114 states and 310 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:25,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:25,931 INFO L93 Difference]: Finished difference Result 175 states and 403 transitions. [2021-06-05 14:00:25,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:00:25,932 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 14:00:25,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:25,932 INFO L225 Difference]: With dead ends: 175 [2021-06-05 14:00:25,932 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 14:00:25,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:00:25,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 14:00:25,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2021-06-05 14:00:25,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.743362831858407) internal successors, (310), 113 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:25,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 310 transitions. [2021-06-05 14:00:25,937 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 310 transitions. Word has length 15 [2021-06-05 14:00:25,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:25,937 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 310 transitions. [2021-06-05 14:00:25,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:25,937 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 310 transitions. [2021-06-05 14:00:25,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:00:25,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:25,938 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:26,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable819 [2021-06-05 14:00:26,160 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:26,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:26,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1261575944, now seen corresponding path program 46 times [2021-06-05 14:00:26,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:26,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276276053] [2021-06-05 14:00:26,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:26,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:26,242 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:26,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:26,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276276053] [2021-06-05 14:00:26,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276276053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:26,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890538642] [2021-06-05 14:00:26,243 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 14:00:26,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:26,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:26,271 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 14:00:26,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:26,504 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:26,504 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 14:00:26,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:26,612 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:26,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-06-05 14:00:26,669 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 14:00:26,691 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:00:26,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:00:26,692 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:18 [2021-06-05 14:00:26,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:26,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890538642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:26,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:26,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:00:26,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645864580] [2021-06-05 14:00:26,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:00:26,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:26,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:00:26,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:00:26,723 INFO L87 Difference]: Start difference. First operand 114 states and 310 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:27,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:27,366 INFO L93 Difference]: Finished difference Result 162 states and 391 transitions. [2021-06-05 14:00:27,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:00:27,366 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 14:00:27,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:27,367 INFO L225 Difference]: With dead ends: 162 [2021-06-05 14:00:27,367 INFO L226 Difference]: Without dead ends: 152 [2021-06-05 14:00:27,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 759.1ms TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:00:27,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-05 14:00:27,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 116. [2021-06-05 14:00:27,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.7217391304347824) internal successors, (313), 115 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:27,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 313 transitions. [2021-06-05 14:00:27,370 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 313 transitions. Word has length 15 [2021-06-05 14:00:27,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:27,370 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 313 transitions. [2021-06-05 14:00:27,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:27,370 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 313 transitions. [2021-06-05 14:00:27,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:00:27,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:27,371 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:27,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable820 [2021-06-05 14:00:27,592 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:27,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:27,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1126532677, now seen corresponding path program 47 times [2021-06-05 14:00:27,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:27,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152819303] [2021-06-05 14:00:27,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:27,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:27,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:27,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:27,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152819303] [2021-06-05 14:00:27,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152819303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:27,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346415467] [2021-06-05 14:00:27,648 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 14:00:27,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:00:27,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:27,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:00:27,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:27,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:27,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346415467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:27,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:27,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 14:00:27,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461077900] [2021-06-05 14:00:27,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:00:27,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:27,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:00:27,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:00:27,726 INFO L87 Difference]: Start difference. First operand 116 states and 313 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:27,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:27,858 INFO L93 Difference]: Finished difference Result 188 states and 448 transitions. [2021-06-05 14:00:27,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:00:27,859 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 14:00:27,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:27,859 INFO L225 Difference]: With dead ends: 188 [2021-06-05 14:00:27,859 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 14:00:27,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 122.5ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:27,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 14:00:27,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 122. [2021-06-05 14:00:27,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.7355371900826446) internal successors, (331), 121 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:27,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 331 transitions. [2021-06-05 14:00:27,862 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 331 transitions. Word has length 15 [2021-06-05 14:00:27,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:27,863 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 331 transitions. [2021-06-05 14:00:27,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:27,863 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 331 transitions. [2021-06-05 14:00:27,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:27,863 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:27,863 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:28,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable855,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:28,077 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:28,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:28,077 INFO L82 PathProgramCache]: Analyzing trace with hash -43188332, now seen corresponding path program 48 times [2021-06-05 14:00:28,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:28,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87440341] [2021-06-05 14:00:28,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:28,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:28,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:28,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:28,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87440341] [2021-06-05 14:00:28,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87440341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:28,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399860413] [2021-06-05 14:00:28,174 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 14:00:28,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:00:28,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:28,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:00:28,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:28,414 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:28,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:00:28,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:28,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:28,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:28,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:00:28,471 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:28,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399860413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:28,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:28,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:00:28,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952926068] [2021-06-05 14:00:28,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:00:28,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:28,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:00:28,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:00:28,472 INFO L87 Difference]: Start difference. First operand 122 states and 331 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 14:00:28,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:28,754 INFO L93 Difference]: Finished difference Result 161 states and 428 transitions. [2021-06-05 14:00:28,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:00:28,754 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 16 [2021-06-05 14:00:28,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:28,755 INFO L225 Difference]: With dead ends: 161 [2021-06-05 14:00:28,755 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 14:00:28,755 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 263.1ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:00:28,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 14:00:28,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 134. [2021-06-05 14:00:28,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.7593984962406015) internal successors, (367), 133 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:28,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 367 transitions. [2021-06-05 14:00:28,762 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 367 transitions. Word has length 16 [2021-06-05 14:00:28,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:28,762 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 367 transitions. [2021-06-05 14:00:28,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 14:00:28,762 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 367 transitions. [2021-06-05 14:00:28,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:28,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:28,762 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:28,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable856,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:28,985 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:28,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:28,986 INFO L82 PathProgramCache]: Analyzing trace with hash 343012782, now seen corresponding path program 49 times [2021-06-05 14:00:28,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:28,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428557235] [2021-06-05 14:00:28,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:28,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:29,100 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:29,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:29,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428557235] [2021-06-05 14:00:29,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428557235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:29,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065967737] [2021-06-05 14:00:29,100 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 14:00:29,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:29,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:00:29,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:29,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:29,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:00:29,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:29,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:29,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:29,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:00:29,453 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:29,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065967737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:29,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:29,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:00:29,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908711271] [2021-06-05 14:00:29,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:00:29,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:29,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:00:29,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:00:29,454 INFO L87 Difference]: Start difference. First operand 134 states and 367 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:29,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:29,796 INFO L93 Difference]: Finished difference Result 174 states and 444 transitions. [2021-06-05 14:00:29,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:00:29,796 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:00:29,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:29,797 INFO L225 Difference]: With dead ends: 174 [2021-06-05 14:00:29,797 INFO L226 Difference]: Without dead ends: 169 [2021-06-05 14:00:29,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 309.7ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:00:29,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-05 14:00:29,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 134. [2021-06-05 14:00:29,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.7593984962406015) internal successors, (367), 133 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:29,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 367 transitions. [2021-06-05 14:00:29,800 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 367 transitions. Word has length 16 [2021-06-05 14:00:29,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:29,801 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 367 transitions. [2021-06-05 14:00:29,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:29,801 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 367 transitions. [2021-06-05 14:00:29,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:29,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:29,801 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:30,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable881,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:30,009 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:30,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:30,009 INFO L82 PathProgramCache]: Analyzing trace with hash -318251001, now seen corresponding path program 50 times [2021-06-05 14:00:30,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:30,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359520126] [2021-06-05 14:00:30,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:30,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:30,061 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:30,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:30,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359520126] [2021-06-05 14:00:30,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359520126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:30,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179168111] [2021-06-05 14:00:30,062 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 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 14:00:30,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:30,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:30,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:00:30,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:30,126 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:30,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179168111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:30,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:30,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 14:00:30,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874544430] [2021-06-05 14:00:30,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:00:30,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:30,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:00:30,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:00:30,127 INFO L87 Difference]: Start difference. First operand 134 states and 367 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:30,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:30,173 INFO L93 Difference]: Finished difference Result 261 states and 586 transitions. [2021-06-05 14:00:30,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:00:30,173 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:00:30,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:30,174 INFO L225 Difference]: With dead ends: 261 [2021-06-05 14:00:30,174 INFO L226 Difference]: Without dead ends: 261 [2021-06-05 14:00:30,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:30,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-05 14:00:30,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 136. [2021-06-05 14:00:30,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.77037037037037) internal successors, (374), 135 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:30,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 374 transitions. [2021-06-05 14:00:30,179 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 374 transitions. Word has length 16 [2021-06-05 14:00:30,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:30,179 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 374 transitions. [2021-06-05 14:00:30,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:30,179 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 374 transitions. [2021-06-05 14:00:30,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:30,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:30,180 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:30,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable906 [2021-06-05 14:00:30,393 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:30,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:30,393 INFO L82 PathProgramCache]: Analyzing trace with hash -713859132, now seen corresponding path program 51 times [2021-06-05 14:00:30,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:30,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55982486] [2021-06-05 14:00:30,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:30,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:30,689 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:30,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:30,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55982486] [2021-06-05 14:00:30,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55982486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:30,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597182920] [2021-06-05 14:00:30,689 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 14:00:30,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:00:30,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:30,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:00:30,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:30,919 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:30,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:00:31,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:31,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:31,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:31,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:00:31,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:31,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597182920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:31,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:31,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:00:31,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438493031] [2021-06-05 14:00:31,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:00:31,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:31,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:00:31,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:00:31,019 INFO L87 Difference]: Start difference. First operand 136 states and 374 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 14:00:31,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:31,251 INFO L93 Difference]: Finished difference Result 173 states and 438 transitions. [2021-06-05 14:00:31,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:00:31,251 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 16 [2021-06-05 14:00:31,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:31,252 INFO L225 Difference]: With dead ends: 173 [2021-06-05 14:00:31,252 INFO L226 Difference]: Without dead ends: 168 [2021-06-05 14:00:31,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 406.2ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:00:31,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-05 14:00:31,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 136. [2021-06-05 14:00:31,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.77037037037037) internal successors, (374), 135 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:31,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 374 transitions. [2021-06-05 14:00:31,282 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 374 transitions. Word has length 16 [2021-06-05 14:00:31,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:31,282 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 374 transitions. [2021-06-05 14:00:31,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 14:00:31,282 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 374 transitions. [2021-06-05 14:00:31,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:31,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:31,283 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:31,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable907,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:31,507 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:31,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:31,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1841255225, now seen corresponding path program 52 times [2021-06-05 14:00:31,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:31,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595937534] [2021-06-05 14:00:31,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:31,559 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:31,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:31,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595937534] [2021-06-05 14:00:31,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595937534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:31,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361552753] [2021-06-05 14:00:31,559 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 14:00:31,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:31,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:31,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:00:31,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:31,747 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:31,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361552753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:31,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:31,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 14:00:31,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578584348] [2021-06-05 14:00:31,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:00:31,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:31,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:00:31,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:00:31,749 INFO L87 Difference]: Start difference. First operand 136 states and 374 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:31,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:31,814 INFO L93 Difference]: Finished difference Result 272 states and 604 transitions. [2021-06-05 14:00:31,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:00:31,815 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:00:31,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:31,816 INFO L225 Difference]: With dead ends: 272 [2021-06-05 14:00:31,816 INFO L226 Difference]: Without dead ends: 272 [2021-06-05 14:00:31,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:00:31,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-06-05 14:00:31,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 136. [2021-06-05 14:00:31,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.77037037037037) internal successors, (374), 135 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:31,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 374 transitions. [2021-06-05 14:00:31,833 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 374 transitions. Word has length 16 [2021-06-05 14:00:31,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:31,833 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 374 transitions. [2021-06-05 14:00:31,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:31,833 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 374 transitions. [2021-06-05 14:00:31,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:31,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:31,834 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:32,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable932 [2021-06-05 14:00:32,046 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:32,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:32,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1220205398, now seen corresponding path program 53 times [2021-06-05 14:00:32,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:32,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561943433] [2021-06-05 14:00:32,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:32,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:32,154 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:32,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:32,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561943433] [2021-06-05 14:00:32,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561943433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:32,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046603496] [2021-06-05 14:00:32,155 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 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 14:00:32,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:00:32,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:32,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:00:32,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:32,434 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:32,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:00:32,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:32,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:32,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:32,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:00:32,484 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:32,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046603496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:32,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:32,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:00:32,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043832127] [2021-06-05 14:00:32,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:00:32,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:32,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:00:32,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:00:32,485 INFO L87 Difference]: Start difference. First operand 136 states and 374 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 14:00:32,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:32,704 INFO L93 Difference]: Finished difference Result 152 states and 404 transitions. [2021-06-05 14:00:32,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:00:32,704 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 16 [2021-06-05 14:00:32,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:32,705 INFO L225 Difference]: With dead ends: 152 [2021-06-05 14:00:32,705 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 14:00:32,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 259.4ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:00:32,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 14:00:32,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 134. [2021-06-05 14:00:32,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.774436090225564) internal successors, (369), 133 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:32,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 369 transitions. [2021-06-05 14:00:32,708 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 369 transitions. Word has length 16 [2021-06-05 14:00:32,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:32,708 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 369 transitions. [2021-06-05 14:00:32,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 14:00:32,708 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 369 transitions. [2021-06-05 14:00:32,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:32,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:32,709 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:32,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable933,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:32,924 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:32,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:32,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1947365805, now seen corresponding path program 54 times [2021-06-05 14:00:32,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:32,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353559440] [2021-06-05 14:00:32,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:32,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:32,961 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:32,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:32,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353559440] [2021-06-05 14:00:32,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353559440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:32,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439623141] [2021-06-05 14:00:32,963 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 14:00:33,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:00:33,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:33,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:00:33,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:33,070 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:33,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439623141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:33,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:33,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 14:00:33,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034779471] [2021-06-05 14:00:33,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:00:33,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:33,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:00:33,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:00:33,071 INFO L87 Difference]: Start difference. First operand 134 states and 369 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:33,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:33,132 INFO L93 Difference]: Finished difference Result 271 states and 600 transitions. [2021-06-05 14:00:33,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:00:33,132 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:00:33,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:33,133 INFO L225 Difference]: With dead ends: 271 [2021-06-05 14:00:33,133 INFO L226 Difference]: Without dead ends: 271 [2021-06-05 14:00:33,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:00:33,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-06-05 14:00:33,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 137. [2021-06-05 14:00:33,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.8088235294117645) internal successors, (382), 136 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:33,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 382 transitions. [2021-06-05 14:00:33,136 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 382 transitions. Word has length 16 [2021-06-05 14:00:33,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:33,137 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 382 transitions. [2021-06-05 14:00:33,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:33,137 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 382 transitions. [2021-06-05 14:00:33,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:33,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:33,137 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:33,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable954 [2021-06-05 14:00:33,361 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:33,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:33,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1809745913, now seen corresponding path program 55 times [2021-06-05 14:00:33,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:33,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438570302] [2021-06-05 14:00:33,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:33,409 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:33,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:33,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438570302] [2021-06-05 14:00:33,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438570302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:33,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143466090] [2021-06-05 14:00:33,409 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 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 14:00:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:33,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:00:33,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:33,473 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:33,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143466090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:33,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:33,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 14:00:33,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31319452] [2021-06-05 14:00:33,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:33,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:33,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:33,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:33,475 INFO L87 Difference]: Start difference. First operand 137 states and 382 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:33,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:33,575 INFO L93 Difference]: Finished difference Result 294 states and 636 transitions. [2021-06-05 14:00:33,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:00:33,575 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:00:33,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:33,576 INFO L225 Difference]: With dead ends: 294 [2021-06-05 14:00:33,576 INFO L226 Difference]: Without dead ends: 294 [2021-06-05 14:00:33,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:33,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-06-05 14:00:33,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 138. [2021-06-05 14:00:33,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.795620437956204) internal successors, (383), 137 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:33,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 383 transitions. [2021-06-05 14:00:33,593 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 383 transitions. Word has length 16 [2021-06-05 14:00:33,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:33,593 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 383 transitions. [2021-06-05 14:00:33,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:33,593 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 383 transitions. [2021-06-05 14:00:33,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:33,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:33,594 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:33,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable955,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:33,795 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:33,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:33,795 INFO L82 PathProgramCache]: Analyzing trace with hash 262929540, now seen corresponding path program 56 times [2021-06-05 14:00:33,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:33,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136857005] [2021-06-05 14:00:33,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:33,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:33,889 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:33,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:33,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136857005] [2021-06-05 14:00:33,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136857005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:33,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828607851] [2021-06-05 14:00:33,889 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 14:00:33,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:33,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:33,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:00:33,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:34,160 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:34,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:00:34,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:34,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:34,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:34,215 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:00:34,219 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:34,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828607851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:34,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:34,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:00:34,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241419900] [2021-06-05 14:00:34,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:00:34,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:34,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:00:34,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:00:34,221 INFO L87 Difference]: Start difference. First operand 138 states and 383 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 14:00:34,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:34,439 INFO L93 Difference]: Finished difference Result 156 states and 422 transitions. [2021-06-05 14:00:34,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:00:34,440 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 16 [2021-06-05 14:00:34,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:34,440 INFO L225 Difference]: With dead ends: 156 [2021-06-05 14:00:34,440 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 14:00:34,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 189.9ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:34,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 14:00:34,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 139. [2021-06-05 14:00:34,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.8043478260869565) internal successors, (387), 138 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:34,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 387 transitions. [2021-06-05 14:00:34,443 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 387 transitions. Word has length 16 [2021-06-05 14:00:34,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:34,443 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 387 transitions. [2021-06-05 14:00:34,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 14:00:34,443 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 387 transitions. [2021-06-05 14:00:34,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:34,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:34,444 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:34,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable956,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:34,668 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:34,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:34,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1196393249, now seen corresponding path program 57 times [2021-06-05 14:00:34,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:34,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639808544] [2021-06-05 14:00:34,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:34,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:34,714 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:34,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:34,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639808544] [2021-06-05 14:00:34,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639808544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:34,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360861253] [2021-06-05 14:00:34,714 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 14:00:34,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:00:34,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:34,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:00:34,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:34,778 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:00:34,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360861253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:34,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:34,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 14:00:34,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081998350] [2021-06-05 14:00:34,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:00:34,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:34,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:00:34,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:00:34,779 INFO L87 Difference]: Start difference. First operand 139 states and 387 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:34,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:34,842 INFO L93 Difference]: Finished difference Result 241 states and 571 transitions. [2021-06-05 14:00:34,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:00:34,842 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:00:34,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:34,843 INFO L225 Difference]: With dead ends: 241 [2021-06-05 14:00:34,843 INFO L226 Difference]: Without dead ends: 241 [2021-06-05 14:00:34,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:00:34,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-06-05 14:00:34,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 156. [2021-06-05 14:00:34,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.8516129032258064) internal successors, (442), 155 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:34,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 442 transitions. [2021-06-05 14:00:34,847 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 442 transitions. Word has length 16 [2021-06-05 14:00:34,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:34,847 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 442 transitions. [2021-06-05 14:00:34,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:34,848 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 442 transitions. [2021-06-05 14:00:34,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:34,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:34,848 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:35,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable979 [2021-06-05 14:00:35,049 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:35,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:35,049 INFO L82 PathProgramCache]: Analyzing trace with hash -864466553, now seen corresponding path program 58 times [2021-06-05 14:00:35,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:35,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964202869] [2021-06-05 14:00:35,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:35,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:35,089 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:35,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:35,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964202869] [2021-06-05 14:00:35,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964202869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:35,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318502377] [2021-06-05 14:00:35,090 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 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 14:00:35,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:35,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:35,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:00:35,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:35,154 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:35,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318502377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:35,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:35,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 14:00:35,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663923800] [2021-06-05 14:00:35,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:00:35,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:35,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:00:35,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:00:35,155 INFO L87 Difference]: Start difference. First operand 156 states and 442 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:35,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:35,213 INFO L93 Difference]: Finished difference Result 263 states and 603 transitions. [2021-06-05 14:00:35,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:00:35,213 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:00:35,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:35,214 INFO L225 Difference]: With dead ends: 263 [2021-06-05 14:00:35,214 INFO L226 Difference]: Without dead ends: 263 [2021-06-05 14:00:35,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:00:35,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-06-05 14:00:35,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 145. [2021-06-05 14:00:35,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.8125) internal successors, (405), 144 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:35,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 405 transitions. [2021-06-05 14:00:35,231 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 405 transitions. Word has length 16 [2021-06-05 14:00:35,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:35,231 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 405 transitions. [2021-06-05 14:00:35,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:35,231 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 405 transitions. [2021-06-05 14:00:35,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:35,232 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:35,232 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:35,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable980 [2021-06-05 14:00:35,463 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:35,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:35,464 INFO L82 PathProgramCache]: Analyzing trace with hash -326610975, now seen corresponding path program 59 times [2021-06-05 14:00:35,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:35,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793507926] [2021-06-05 14:00:35,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:35,514 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:35,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:35,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793507926] [2021-06-05 14:00:35,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793507926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:35,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606959023] [2021-06-05 14:00:35,514 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 14:00:35,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:00:35,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:35,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:00:35,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:35,579 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:35,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606959023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:35,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:35,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 14:00:35,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725552388] [2021-06-05 14:00:35,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:35,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:35,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:35,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:35,580 INFO L87 Difference]: Start difference. First operand 145 states and 405 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:35,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:35,709 INFO L93 Difference]: Finished difference Result 279 states and 612 transitions. [2021-06-05 14:00:35,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:00:35,715 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:00:35,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:35,716 INFO L225 Difference]: With dead ends: 279 [2021-06-05 14:00:35,716 INFO L226 Difference]: Without dead ends: 279 [2021-06-05 14:00:35,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:35,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-06-05 14:00:35,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 139. [2021-06-05 14:00:35,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.7971014492753623) internal successors, (386), 138 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:35,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 386 transitions. [2021-06-05 14:00:35,730 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 386 transitions. Word has length 16 [2021-06-05 14:00:35,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:35,731 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 386 transitions. [2021-06-05 14:00:35,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:35,731 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 386 transitions. [2021-06-05 14:00:35,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:35,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:35,739 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:35,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable981,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:35,961 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:35,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:35,961 INFO L82 PathProgramCache]: Analyzing trace with hash -832957241, now seen corresponding path program 60 times [2021-06-05 14:00:35,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:35,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497496163] [2021-06-05 14:00:35,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:35,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:36,004 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:36,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:36,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497496163] [2021-06-05 14:00:36,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497496163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:36,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17695562] [2021-06-05 14:00:36,006 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 14:00:36,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:00:36,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:36,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:00:36,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:36,070 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:36,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17695562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:36,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:36,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 14:00:36,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071687378] [2021-06-05 14:00:36,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:36,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:36,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:36,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:36,072 INFO L87 Difference]: Start difference. First operand 139 states and 386 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:36,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:36,206 INFO L93 Difference]: Finished difference Result 234 states and 545 transitions. [2021-06-05 14:00:36,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:00:36,206 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:00:36,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:36,207 INFO L225 Difference]: With dead ends: 234 [2021-06-05 14:00:36,207 INFO L226 Difference]: Without dead ends: 234 [2021-06-05 14:00:36,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:00:36,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-05 14:00:36,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 137. [2021-06-05 14:00:36,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.7941176470588234) internal successors, (380), 136 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:36,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 380 transitions. [2021-06-05 14:00:36,226 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 380 transitions. Word has length 16 [2021-06-05 14:00:36,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:36,226 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 380 transitions. [2021-06-05 14:00:36,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:36,226 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 380 transitions. [2021-06-05 14:00:36,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:36,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:36,227 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:36,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable982 [2021-06-05 14:00:36,428 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:36,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:36,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1004527638, now seen corresponding path program 61 times [2021-06-05 14:00:36,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:36,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262019039] [2021-06-05 14:00:36,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:36,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:36,516 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:36,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:36,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262019039] [2021-06-05 14:00:36,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262019039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:36,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320491159] [2021-06-05 14:00:36,521 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 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 14:00:36,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:36,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:00:36,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:36,743 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:36,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:00:36,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:36,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:36,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:36,867 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:00:36,872 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:36,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320491159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:36,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:36,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:00:36,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590067085] [2021-06-05 14:00:36,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:00:36,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:36,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:00:36,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:00:36,874 INFO L87 Difference]: Start difference. First operand 137 states and 380 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 14:00:37,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:37,137 INFO L93 Difference]: Finished difference Result 184 states and 502 transitions. [2021-06-05 14:00:37,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:00:37,138 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 16 [2021-06-05 14:00:37,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:37,139 INFO L225 Difference]: With dead ends: 184 [2021-06-05 14:00:37,139 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 14:00:37,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 200.1ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:37,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 14:00:37,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 151. [2021-06-05 14:00:37,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.8733333333333335) internal successors, (431), 150 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:37,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 431 transitions. [2021-06-05 14:00:37,147 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 431 transitions. Word has length 16 [2021-06-05 14:00:37,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:37,147 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 431 transitions. [2021-06-05 14:00:37,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 14:00:37,147 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 431 transitions. [2021-06-05 14:00:37,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:37,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:37,148 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:37,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable983 [2021-06-05 14:00:37,370 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:37,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:37,371 INFO L82 PathProgramCache]: Analyzing trace with hash 590199854, now seen corresponding path program 62 times [2021-06-05 14:00:37,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:37,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565079852] [2021-06-05 14:00:37,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:37,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:37,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:37,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:37,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565079852] [2021-06-05 14:00:37,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565079852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:37,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908503522] [2021-06-05 14:00:37,526 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 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 14:00:37,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:37,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:37,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 14:00:37,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:37,765 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:37,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 14:00:37,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:37,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:37,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:37,870 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 14:00:37,875 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:37,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908503522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:37,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:37,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 14:00:37,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414124064] [2021-06-05 14:00:37,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:00:37,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:37,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:00:37,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:00:37,877 INFO L87 Difference]: Start difference. First operand 151 states and 431 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:38,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:38,261 INFO L93 Difference]: Finished difference Result 197 states and 515 transitions. [2021-06-05 14:00:38,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:00:38,261 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:00:38,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:38,262 INFO L225 Difference]: With dead ends: 197 [2021-06-05 14:00:38,263 INFO L226 Difference]: Without dead ends: 192 [2021-06-05 14:00:38,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 321.0ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:00:38,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-05 14:00:38,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 151. [2021-06-05 14:00:38,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.8733333333333335) internal successors, (431), 150 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:38,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 431 transitions. [2021-06-05 14:00:38,266 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 431 transitions. Word has length 16 [2021-06-05 14:00:38,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:38,266 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 431 transitions. [2021-06-05 14:00:38,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:38,266 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 431 transitions. [2021-06-05 14:00:38,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:38,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:38,267 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:38,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1018 [2021-06-05 14:00:38,486 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:38,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:38,486 INFO L82 PathProgramCache]: Analyzing trace with hash -71063929, now seen corresponding path program 63 times [2021-06-05 14:00:38,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:38,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147394163] [2021-06-05 14:00:38,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:38,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:38,539 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:38,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:38,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147394163] [2021-06-05 14:00:38,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147394163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:38,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318789691] [2021-06-05 14:00:38,539 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 14:00:38,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:00:38,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:38,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:00:38,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:38,599 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:38,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318789691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:38,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:38,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 14:00:38,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094886110] [2021-06-05 14:00:38,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:00:38,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:38,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:00:38,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:00:38,609 INFO L87 Difference]: Start difference. First operand 151 states and 431 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:38,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:38,663 INFO L93 Difference]: Finished difference Result 269 states and 624 transitions. [2021-06-05 14:00:38,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:00:38,664 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:00:38,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:38,665 INFO L225 Difference]: With dead ends: 269 [2021-06-05 14:00:38,665 INFO L226 Difference]: Without dead ends: 269 [2021-06-05 14:00:38,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:38,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-06-05 14:00:38,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 158. [2021-06-05 14:00:38,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8980891719745223) internal successors, (455), 157 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:38,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 455 transitions. [2021-06-05 14:00:38,668 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 455 transitions. Word has length 16 [2021-06-05 14:00:38,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:38,669 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 455 transitions. [2021-06-05 14:00:38,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:38,669 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 455 transitions. [2021-06-05 14:00:38,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:38,669 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:38,669 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:38,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1050,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:38,885 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:38,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:38,885 INFO L82 PathProgramCache]: Analyzing trace with hash -2131923731, now seen corresponding path program 64 times [2021-06-05 14:00:38,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:38,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131024496] [2021-06-05 14:00:38,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:38,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:38,937 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:38,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:38,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131024496] [2021-06-05 14:00:38,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131024496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:38,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927299407] [2021-06-05 14:00:38,937 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 14:00:38,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:38,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:38,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:00:38,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:38,995 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:38,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927299407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:38,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:38,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 14:00:38,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988690738] [2021-06-05 14:00:38,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:00:38,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:39,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:00:39,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:00:39,006 INFO L87 Difference]: Start difference. First operand 158 states and 455 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:39,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:39,057 INFO L93 Difference]: Finished difference Result 244 states and 614 transitions. [2021-06-05 14:00:39,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:00:39,057 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:00:39,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:39,058 INFO L225 Difference]: With dead ends: 244 [2021-06-05 14:00:39,058 INFO L226 Difference]: Without dead ends: 244 [2021-06-05 14:00:39,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 43.6ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:39,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-05 14:00:39,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 175. [2021-06-05 14:00:39,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.9195402298850577) internal successors, (508), 174 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:39,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 508 transitions. [2021-06-05 14:00:39,081 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 508 transitions. Word has length 16 [2021-06-05 14:00:39,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:39,081 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 508 transitions. [2021-06-05 14:00:39,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:39,081 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 508 transitions. [2021-06-05 14:00:39,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:39,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:39,082 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:39,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1051,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:39,282 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:39,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:39,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1594068153, now seen corresponding path program 65 times [2021-06-05 14:00:39,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:39,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645861760] [2021-06-05 14:00:39,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:39,350 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:39,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:39,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645861760] [2021-06-05 14:00:39,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645861760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:39,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466390985] [2021-06-05 14:00:39,351 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 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 14:00:39,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:00:39,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:39,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:00:39,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:39,420 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:39,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466390985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:39,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:39,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 14:00:39,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850745208] [2021-06-05 14:00:39,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:39,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:39,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:39,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:39,421 INFO L87 Difference]: Start difference. First operand 175 states and 508 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:39,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:39,514 INFO L93 Difference]: Finished difference Result 268 states and 649 transitions. [2021-06-05 14:00:39,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:00:39,514 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:00:39,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:39,515 INFO L225 Difference]: With dead ends: 268 [2021-06-05 14:00:39,515 INFO L226 Difference]: Without dead ends: 268 [2021-06-05 14:00:39,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 90.1ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:00:39,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-05 14:00:39,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 172. [2021-06-05 14:00:39,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.912280701754386) internal successors, (498), 171 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:39,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 498 transitions. [2021-06-05 14:00:39,534 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 498 transitions. Word has length 16 [2021-06-05 14:00:39,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:39,534 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 498 transitions. [2021-06-05 14:00:39,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:39,535 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 498 transitions. [2021-06-05 14:00:39,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:39,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:39,548 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:39,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1052,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:39,765 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:39,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:39,765 INFO L82 PathProgramCache]: Analyzing trace with hash -2100414419, now seen corresponding path program 66 times [2021-06-05 14:00:39,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:39,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139794486] [2021-06-05 14:00:39,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:39,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:39,806 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:39,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:39,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139794486] [2021-06-05 14:00:39,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139794486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:39,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384720262] [2021-06-05 14:00:39,807 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 14:00:39,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:00:39,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:39,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:00:39,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:39,893 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:39,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384720262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:39,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:39,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 14:00:39,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484680773] [2021-06-05 14:00:39,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:39,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:39,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:39,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:39,894 INFO L87 Difference]: Start difference. First operand 172 states and 498 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:40,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:40,004 INFO L93 Difference]: Finished difference Result 237 states and 603 transitions. [2021-06-05 14:00:40,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:00:40,005 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:00:40,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:40,006 INFO L225 Difference]: With dead ends: 237 [2021-06-05 14:00:40,006 INFO L226 Difference]: Without dead ends: 237 [2021-06-05 14:00:40,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 105.0ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:40,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-05 14:00:40,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 172. [2021-06-05 14:00:40,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.912280701754386) internal successors, (498), 171 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:40,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 498 transitions. [2021-06-05 14:00:40,009 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 498 transitions. Word has length 16 [2021-06-05 14:00:40,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:40,010 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 498 transitions. [2021-06-05 14:00:40,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:40,010 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 498 transitions. [2021-06-05 14:00:40,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:00:40,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:40,010 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:40,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1053,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:40,233 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:40,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:40,233 INFO L82 PathProgramCache]: Analyzing trace with hash -617279481, now seen corresponding path program 67 times [2021-06-05 14:00:40,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:40,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858606245] [2021-06-05 14:00:40,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:40,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:40,278 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:40,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:40,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858606245] [2021-06-05 14:00:40,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858606245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:40,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973492134] [2021-06-05 14:00:40,279 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 14:00:40,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:40,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 14:00:40,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:40,342 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:40,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973492134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:40,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:40,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 14:00:40,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512566596] [2021-06-05 14:00:40,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:40,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:40,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:40,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:40,343 INFO L87 Difference]: Start difference. First operand 172 states and 498 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:40,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:40,460 INFO L93 Difference]: Finished difference Result 261 states and 681 transitions. [2021-06-05 14:00:40,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:00:40,460 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:00:40,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:40,461 INFO L225 Difference]: With dead ends: 261 [2021-06-05 14:00:40,461 INFO L226 Difference]: Without dead ends: 261 [2021-06-05 14:00:40,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:40,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-05 14:00:40,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 179. [2021-06-05 14:00:40,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.9157303370786516) internal successors, (519), 178 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:40,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 519 transitions. [2021-06-05 14:00:40,465 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 519 transitions. Word has length 16 [2021-06-05 14:00:40,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:40,465 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 519 transitions. [2021-06-05 14:00:40,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:40,465 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 519 transitions. [2021-06-05 14:00:40,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:40,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:40,466 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:40,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1054,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:40,667 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:40,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:40,667 INFO L82 PathProgramCache]: Analyzing trace with hash 467715592, now seen corresponding path program 68 times [2021-06-05 14:00:40,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:40,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40912809] [2021-06-05 14:00:40,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:40,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:40,737 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:40,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:40,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40912809] [2021-06-05 14:00:40,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40912809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:40,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42739040] [2021-06-05 14:00:40,738 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 14:00:40,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:40,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:40,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:40,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:40,808 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:40,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42739040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:40,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:40,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:00:40,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807380041] [2021-06-05 14:00:40,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:00:40,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:40,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:00:40,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:40,810 INFO L87 Difference]: Start difference. First operand 179 states and 519 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:00:40,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:40,902 INFO L93 Difference]: Finished difference Result 282 states and 694 transitions. [2021-06-05 14:00:40,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:00:40,903 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-06-05 14:00:40,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:40,904 INFO L225 Difference]: With dead ends: 282 [2021-06-05 14:00:40,904 INFO L226 Difference]: Without dead ends: 282 [2021-06-05 14:00:40,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:40,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-06-05 14:00:40,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 190. [2021-06-05 14:00:40,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.9523809523809526) internal successors, (558), 189 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:40,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 558 transitions. [2021-06-05 14:00:40,908 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 558 transitions. Word has length 17 [2021-06-05 14:00:40,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:40,908 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 558 transitions. [2021-06-05 14:00:40,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:00:40,908 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 558 transitions. [2021-06-05 14:00:40,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:40,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:40,909 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:41,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1055 [2021-06-05 14:00:41,123 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:41,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:41,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1312212869, now seen corresponding path program 69 times [2021-06-05 14:00:41,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:41,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929067534] [2021-06-05 14:00:41,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:41,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:41,171 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:41,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:41,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929067534] [2021-06-05 14:00:41,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929067534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:41,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031509974] [2021-06-05 14:00:41,172 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 14:00:41,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:00:41,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:41,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:41,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:41,254 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:41,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031509974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:41,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:41,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:00:41,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086653376] [2021-06-05 14:00:41,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:00:41,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:41,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:00:41,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:41,256 INFO L87 Difference]: Start difference. First operand 190 states and 558 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:00:41,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:41,415 INFO L93 Difference]: Finished difference Result 315 states and 767 transitions. [2021-06-05 14:00:41,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:00:41,416 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-06-05 14:00:41,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:41,417 INFO L225 Difference]: With dead ends: 315 [2021-06-05 14:00:41,417 INFO L226 Difference]: Without dead ends: 308 [2021-06-05 14:00:41,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 114.2ms TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:00:41,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-06-05 14:00:41,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 196. [2021-06-05 14:00:41,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.933333333333333) internal successors, (572), 195 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:41,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 572 transitions. [2021-06-05 14:00:41,422 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 572 transitions. Word has length 17 [2021-06-05 14:00:41,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:41,422 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 572 transitions. [2021-06-05 14:00:41,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:00:41,422 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 572 transitions. [2021-06-05 14:00:41,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:41,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:41,423 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:41,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1056 [2021-06-05 14:00:41,643 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:41,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:41,643 INFO L82 PathProgramCache]: Analyzing trace with hash 853916706, now seen corresponding path program 70 times [2021-06-05 14:00:41,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:41,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791485223] [2021-06-05 14:00:41,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:41,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:41,686 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:41,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:41,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791485223] [2021-06-05 14:00:41,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791485223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:41,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970148341] [2021-06-05 14:00:41,686 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 14:00:41,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:41,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:41,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:41,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:41,749 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:41,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970148341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:41,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:41,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 14:00:41,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592033736] [2021-06-05 14:00:41,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:41,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:41,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:41,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:41,751 INFO L87 Difference]: Start difference. First operand 196 states and 572 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:41,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:41,854 INFO L93 Difference]: Finished difference Result 233 states and 626 transitions. [2021-06-05 14:00:41,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:00:41,854 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-06-05 14:00:41,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:41,855 INFO L225 Difference]: With dead ends: 233 [2021-06-05 14:00:41,855 INFO L226 Difference]: Without dead ends: 229 [2021-06-05 14:00:41,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 73.7ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:41,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-06-05 14:00:41,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 198. [2021-06-05 14:00:41,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.9035532994923856) internal successors, (572), 197 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:41,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 572 transitions. [2021-06-05 14:00:41,858 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 572 transitions. Word has length 17 [2021-06-05 14:00:41,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:41,858 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 572 transitions. [2021-06-05 14:00:41,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:41,859 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 572 transitions. [2021-06-05 14:00:41,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:41,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:41,859 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:42,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1057 [2021-06-05 14:00:42,082 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:42,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:42,082 INFO L82 PathProgramCache]: Analyzing trace with hash 192652923, now seen corresponding path program 71 times [2021-06-05 14:00:42,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:42,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065052010] [2021-06-05 14:00:42,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:42,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:42,131 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:42,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:42,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065052010] [2021-06-05 14:00:42,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065052010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:42,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150732124] [2021-06-05 14:00:42,132 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 14:00:42,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:00:42,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:42,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:42,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:42,207 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:42,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150732124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:42,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:42,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 14:00:42,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143285747] [2021-06-05 14:00:42,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:42,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:42,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:42,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:42,209 INFO L87 Difference]: Start difference. First operand 198 states and 572 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:42,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:42,275 INFO L93 Difference]: Finished difference Result 310 states and 743 transitions. [2021-06-05 14:00:42,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:00:42,275 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-06-05 14:00:42,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:42,276 INFO L225 Difference]: With dead ends: 310 [2021-06-05 14:00:42,276 INFO L226 Difference]: Without dead ends: 310 [2021-06-05 14:00:42,277 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:42,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-06-05 14:00:42,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 188. [2021-06-05 14:00:42,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.855614973262032) internal successors, (534), 187 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:42,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 534 transitions. [2021-06-05 14:00:42,288 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 534 transitions. Word has length 17 [2021-06-05 14:00:42,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:42,288 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 534 transitions. [2021-06-05 14:00:42,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:42,288 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 534 transitions. [2021-06-05 14:00:42,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:42,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:42,289 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:42,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1058,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:42,497 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:42,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:42,497 INFO L82 PathProgramCache]: Analyzing trace with hash 2007436600, now seen corresponding path program 72 times [2021-06-05 14:00:42,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:42,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049841934] [2021-06-05 14:00:42,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:42,551 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:42,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:42,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049841934] [2021-06-05 14:00:42,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049841934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:42,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459001912] [2021-06-05 14:00:42,551 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 14:00:42,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:00:42,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:42,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:42,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:42,761 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:42,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459001912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:42,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:42,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 14:00:42,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029013223] [2021-06-05 14:00:42,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:42,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:42,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:42,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:42,762 INFO L87 Difference]: Start difference. First operand 188 states and 534 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:42,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:42,873 INFO L93 Difference]: Finished difference Result 256 states and 671 transitions. [2021-06-05 14:00:42,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:00:42,874 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-06-05 14:00:42,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:42,875 INFO L225 Difference]: With dead ends: 256 [2021-06-05 14:00:42,875 INFO L226 Difference]: Without dead ends: 252 [2021-06-05 14:00:42,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:00:42,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-05 14:00:42,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 197. [2021-06-05 14:00:42,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.8469387755102042) internal successors, (558), 196 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:42,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 558 transitions. [2021-06-05 14:00:42,879 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 558 transitions. Word has length 17 [2021-06-05 14:00:42,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:42,879 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 558 transitions. [2021-06-05 14:00:42,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:42,879 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 558 transitions. [2021-06-05 14:00:42,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:42,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:42,880 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:43,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1059 [2021-06-05 14:00:43,103 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:43,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:43,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1330351301, now seen corresponding path program 73 times [2021-06-05 14:00:43,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:43,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999356809] [2021-06-05 14:00:43,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:43,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:43,155 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:43,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:43,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999356809] [2021-06-05 14:00:43,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999356809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:43,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531093731] [2021-06-05 14:00:43,155 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 14:00:43,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:43,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:43,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:43,234 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:43,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531093731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:43,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:43,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 14:00:43,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26663584] [2021-06-05 14:00:43,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:43,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:43,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:43,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:43,236 INFO L87 Difference]: Start difference. First operand 197 states and 558 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:43,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:43,307 INFO L93 Difference]: Finished difference Result 333 states and 786 transitions. [2021-06-05 14:00:43,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:00:43,308 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-06-05 14:00:43,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:43,309 INFO L225 Difference]: With dead ends: 333 [2021-06-05 14:00:43,309 INFO L226 Difference]: Without dead ends: 333 [2021-06-05 14:00:43,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:00:43,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-06-05 14:00:43,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 199. [2021-06-05 14:00:43,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.8535353535353534) internal successors, (565), 198 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:43,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 565 transitions. [2021-06-05 14:00:43,314 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 565 transitions. Word has length 17 [2021-06-05 14:00:43,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:43,314 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 565 transitions. [2021-06-05 14:00:43,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:43,315 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 565 transitions. [2021-06-05 14:00:43,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:43,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:43,316 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:43,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1060,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:43,516 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:43,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:43,517 INFO L82 PathProgramCache]: Analyzing trace with hash -888152350, now seen corresponding path program 74 times [2021-06-05 14:00:43,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:43,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795034142] [2021-06-05 14:00:43,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:43,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:43,567 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:43,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:43,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795034142] [2021-06-05 14:00:43,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795034142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:43,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148848232] [2021-06-05 14:00:43,568 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 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 14:00:43,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:43,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:43,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:43,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:43,692 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:43,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148848232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:43,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:43,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:00:43,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385014440] [2021-06-05 14:00:43,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:43,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:43,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:43,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:43,694 INFO L87 Difference]: Start difference. First operand 199 states and 565 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:43,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:43,803 INFO L93 Difference]: Finished difference Result 260 states and 680 transitions. [2021-06-05 14:00:43,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:00:43,804 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-06-05 14:00:43,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:43,805 INFO L225 Difference]: With dead ends: 260 [2021-06-05 14:00:43,805 INFO L226 Difference]: Without dead ends: 254 [2021-06-05 14:00:43,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:00:43,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-05 14:00:43,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 201. [2021-06-05 14:00:43,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.835) internal successors, (567), 200 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:43,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 567 transitions. [2021-06-05 14:00:43,809 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 567 transitions. Word has length 17 [2021-06-05 14:00:43,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:43,810 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 567 transitions. [2021-06-05 14:00:43,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:43,810 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 567 transitions. [2021-06-05 14:00:43,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:43,811 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:43,811 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:44,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1061,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:44,033 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:44,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:44,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1298841989, now seen corresponding path program 75 times [2021-06-05 14:00:44,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:44,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386086688] [2021-06-05 14:00:44,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:44,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:44,088 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:44,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:44,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386086688] [2021-06-05 14:00:44,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386086688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:44,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212784094] [2021-06-05 14:00:44,090 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 14:00:44,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:00:44,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:44,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:44,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:44,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212784094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:44,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:44,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:00:44,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857865575] [2021-06-05 14:00:44,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:44,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:44,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:44,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:44,246 INFO L87 Difference]: Start difference. First operand 201 states and 567 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:44,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:44,344 INFO L93 Difference]: Finished difference Result 348 states and 819 transitions. [2021-06-05 14:00:44,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:00:44,344 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-06-05 14:00:44,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:44,345 INFO L225 Difference]: With dead ends: 348 [2021-06-05 14:00:44,345 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 14:00:44,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:44,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 14:00:44,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 201. [2021-06-05 14:00:44,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.835) internal successors, (567), 200 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:44,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 567 transitions. [2021-06-05 14:00:44,368 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 567 transitions. Word has length 17 [2021-06-05 14:00:44,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:44,368 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 567 transitions. [2021-06-05 14:00:44,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:44,368 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 567 transitions. [2021-06-05 14:00:44,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:44,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:44,369 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:44,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1062,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:44,589 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:44,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:44,589 INFO L82 PathProgramCache]: Analyzing trace with hash 773833464, now seen corresponding path program 76 times [2021-06-05 14:00:44,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:44,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031364277] [2021-06-05 14:00:44,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:44,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:44,634 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:44,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:44,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031364277] [2021-06-05 14:00:44,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031364277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:44,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044445454] [2021-06-05 14:00:44,634 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 14:00:44,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:44,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:44,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:44,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:00:44,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044445454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:44,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:44,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 14:00:44,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058401353] [2021-06-05 14:00:44,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:00:44,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:44,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:00:44,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:00:44,724 INFO L87 Difference]: Start difference. First operand 201 states and 567 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:44,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:44,764 INFO L93 Difference]: Finished difference Result 328 states and 825 transitions. [2021-06-05 14:00:44,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:00:44,764 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 14:00:44,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:44,765 INFO L225 Difference]: With dead ends: 328 [2021-06-05 14:00:44,765 INFO L226 Difference]: Without dead ends: 328 [2021-06-05 14:00:44,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:00:44,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-06-05 14:00:44,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 216. [2021-06-05 14:00:44,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.902325581395349) internal successors, (624), 215 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:44,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 624 transitions. [2021-06-05 14:00:44,769 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 624 transitions. Word has length 17 [2021-06-05 14:00:44,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:44,770 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 624 transitions. [2021-06-05 14:00:44,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:44,770 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 624 transitions. [2021-06-05 14:00:44,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:44,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:44,772 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:44,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1063 [2021-06-05 14:00:44,993 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:44,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:44,993 INFO L82 PathProgramCache]: Analyzing trace with hash 854963749, now seen corresponding path program 77 times [2021-06-05 14:00:44,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:44,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118051351] [2021-06-05 14:00:44,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:45,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:45,042 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:45,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:45,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118051351] [2021-06-05 14:00:45,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118051351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:45,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153000148] [2021-06-05 14:00:45,043 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 14:00:45,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:00:45,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:45,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:45,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:00:45,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153000148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:45,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:45,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 14:00:45,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779932578] [2021-06-05 14:00:45,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:00:45,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:45,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:00:45,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:00:45,106 INFO L87 Difference]: Start difference. First operand 216 states and 624 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:45,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:45,189 INFO L93 Difference]: Finished difference Result 306 states and 770 transitions. [2021-06-05 14:00:45,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:00:45,189 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 14:00:45,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:45,190 INFO L225 Difference]: With dead ends: 306 [2021-06-05 14:00:45,190 INFO L226 Difference]: Without dead ends: 304 [2021-06-05 14:00:45,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:00:45,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-06-05 14:00:45,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 226. [2021-06-05 14:00:45,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.92) internal successors, (657), 225 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:45,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 657 transitions. [2021-06-05 14:00:45,194 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 657 transitions. Word has length 17 [2021-06-05 14:00:45,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:45,195 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 657 transitions. [2021-06-05 14:00:45,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:45,195 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 657 transitions. [2021-06-05 14:00:45,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:45,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:45,205 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:45,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1064,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:45,406 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:45,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:45,406 INFO L82 PathProgramCache]: Analyzing trace with hash -353562629, now seen corresponding path program 78 times [2021-06-05 14:00:45,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:45,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231603031] [2021-06-05 14:00:45,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:45,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:45,465 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:45,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:45,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231603031] [2021-06-05 14:00:45,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231603031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:45,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781987951] [2021-06-05 14:00:45,466 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 14:00:45,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:00:45,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:45,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:45,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:45,554 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:45,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781987951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:45,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:45,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 14:00:45,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713395213] [2021-06-05 14:00:45,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:00:45,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:45,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:00:45,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:00:45,555 INFO L87 Difference]: Start difference. First operand 226 states and 657 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:45,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:45,615 INFO L93 Difference]: Finished difference Result 312 states and 782 transitions. [2021-06-05 14:00:45,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:00:45,615 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 14:00:45,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:45,616 INFO L225 Difference]: With dead ends: 312 [2021-06-05 14:00:45,616 INFO L226 Difference]: Without dead ends: 312 [2021-06-05 14:00:45,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:00:45,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-06-05 14:00:45,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 225. [2021-06-05 14:00:45,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.9151785714285716) internal successors, (653), 224 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:45,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 653 transitions. [2021-06-05 14:00:45,620 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 653 transitions. Word has length 17 [2021-06-05 14:00:45,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:45,620 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 653 transitions. [2021-06-05 14:00:45,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:45,621 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 653 transitions. [2021-06-05 14:00:45,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:45,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:45,621 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:45,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1065,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:45,841 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:45,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:45,842 INFO L82 PathProgramCache]: Analyzing trace with hash 594982588, now seen corresponding path program 79 times [2021-06-05 14:00:45,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:45,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667147948] [2021-06-05 14:00:45,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:45,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:45,882 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:45,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:45,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667147948] [2021-06-05 14:00:45,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667147948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:45,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621729564] [2021-06-05 14:00:45,883 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 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 14:00:45,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:45,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:45,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:45,942 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:45,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621729564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:45,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:45,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:00:45,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313083270] [2021-06-05 14:00:45,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:45,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:45,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:45,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:45,943 INFO L87 Difference]: Start difference. First operand 225 states and 653 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:46,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:46,046 INFO L93 Difference]: Finished difference Result 311 states and 814 transitions. [2021-06-05 14:00:46,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:00:46,046 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-06-05 14:00:46,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:46,047 INFO L225 Difference]: With dead ends: 311 [2021-06-05 14:00:46,047 INFO L226 Difference]: Without dead ends: 299 [2021-06-05 14:00:46,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:00:46,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-06-05 14:00:46,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 227. [2021-06-05 14:00:46,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.898230088495575) internal successors, (655), 226 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:46,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 655 transitions. [2021-06-05 14:00:46,064 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 655 transitions. Word has length 17 [2021-06-05 14:00:46,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:46,064 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 655 transitions. [2021-06-05 14:00:46,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:46,064 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 655 transitions. [2021-06-05 14:00:46,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:46,066 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:46,066 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:46,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1066 [2021-06-05 14:00:46,280 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:46,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:46,280 INFO L82 PathProgramCache]: Analyzing trace with hash 184292949, now seen corresponding path program 80 times [2021-06-05 14:00:46,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:46,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780562892] [2021-06-05 14:00:46,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:46,343 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:46,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:46,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780562892] [2021-06-05 14:00:46,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780562892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:46,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65200782] [2021-06-05 14:00:46,344 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 14:00:46,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:46,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:46,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:46,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:46,420 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:46,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65200782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:46,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:46,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:00:46,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327330927] [2021-06-05 14:00:46,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:46,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:46,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:46,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:46,421 INFO L87 Difference]: Start difference. First operand 227 states and 655 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:46,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:46,522 INFO L93 Difference]: Finished difference Result 338 states and 826 transitions. [2021-06-05 14:00:46,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:00:46,523 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-06-05 14:00:46,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:46,524 INFO L225 Difference]: With dead ends: 338 [2021-06-05 14:00:46,524 INFO L226 Difference]: Without dead ends: 338 [2021-06-05 14:00:46,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 79.8ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:46,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-06-05 14:00:46,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 227. [2021-06-05 14:00:46,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.898230088495575) internal successors, (655), 226 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:46,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 655 transitions. [2021-06-05 14:00:46,529 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 655 transitions. Word has length 17 [2021-06-05 14:00:46,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:46,529 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 655 transitions. [2021-06-05 14:00:46,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:46,529 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 655 transitions. [2021-06-05 14:00:46,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:46,530 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:46,530 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:46,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1067 [2021-06-05 14:00:46,754 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:46,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:46,754 INFO L82 PathProgramCache]: Analyzing trace with hash -457096584, now seen corresponding path program 81 times [2021-06-05 14:00:46,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:46,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716175977] [2021-06-05 14:00:46,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:46,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:47,101 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:47,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:47,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716175977] [2021-06-05 14:00:47,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716175977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:47,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774540282] [2021-06-05 14:00:47,102 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 14:00:47,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:00:47,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:47,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:47,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:47,170 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:47,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774540282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:47,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:47,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:00:47,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41682637] [2021-06-05 14:00:47,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:00:47,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:47,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:00:47,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:47,171 INFO L87 Difference]: Start difference. First operand 227 states and 655 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:00:47,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:47,269 INFO L93 Difference]: Finished difference Result 329 states and 850 transitions. [2021-06-05 14:00:47,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:00:47,270 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-06-05 14:00:47,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:47,271 INFO L225 Difference]: With dead ends: 329 [2021-06-05 14:00:47,271 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 14:00:47,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 344.3ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:47,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 14:00:47,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 231. [2021-06-05 14:00:47,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.878260869565217) internal successors, (662), 230 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:47,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 662 transitions. [2021-06-05 14:00:47,275 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 662 transitions. Word has length 17 [2021-06-05 14:00:47,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:47,276 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 662 transitions. [2021-06-05 14:00:47,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:00:47,276 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 662 transitions. [2021-06-05 14:00:47,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:47,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:47,276 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:47,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1068,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:47,490 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:47,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:47,490 INFO L82 PathProgramCache]: Analyzing trace with hash -322053317, now seen corresponding path program 82 times [2021-06-05 14:00:47,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:47,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407131391] [2021-06-05 14:00:47,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:47,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:47,554 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:47,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:47,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407131391] [2021-06-05 14:00:47,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407131391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:47,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578047475] [2021-06-05 14:00:47,554 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 14:00:47,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:47,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:47,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:47,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:47,622 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:47,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578047475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:47,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:47,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:00:47,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659537075] [2021-06-05 14:00:47,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:00:47,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:47,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:00:47,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:47,623 INFO L87 Difference]: Start difference. First operand 231 states and 662 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:00:47,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:47,779 INFO L93 Difference]: Finished difference Result 375 states and 902 transitions. [2021-06-05 14:00:47,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:00:47,780 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-06-05 14:00:47,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:47,781 INFO L225 Difference]: With dead ends: 375 [2021-06-05 14:00:47,781 INFO L226 Difference]: Without dead ends: 375 [2021-06-05 14:00:47,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 126.0ms TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:00:47,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-06-05 14:00:47,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 228. [2021-06-05 14:00:47,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.86784140969163) internal successors, (651), 227 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:47,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 651 transitions. [2021-06-05 14:00:47,805 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 651 transitions. Word has length 17 [2021-06-05 14:00:47,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:47,806 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 651 transitions. [2021-06-05 14:00:47,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:00:47,806 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 651 transitions. [2021-06-05 14:00:47,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:47,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:47,806 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:48,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1069 [2021-06-05 14:00:48,007 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:48,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:48,007 INFO L82 PathProgramCache]: Analyzing trace with hash -493623714, now seen corresponding path program 83 times [2021-06-05 14:00:48,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:48,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167326560] [2021-06-05 14:00:48,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:48,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:48,071 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:48,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:48,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167326560] [2021-06-05 14:00:48,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167326560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:48,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139184106] [2021-06-05 14:00:48,072 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 14:00:48,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:00:48,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:48,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:48,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:48,162 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:48,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139184106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:48,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:48,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 14:00:48,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826073736] [2021-06-05 14:00:48,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:00:48,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:48,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:00:48,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:00:48,163 INFO L87 Difference]: Start difference. First operand 228 states and 651 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:48,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:48,217 INFO L93 Difference]: Finished difference Result 391 states and 994 transitions. [2021-06-05 14:00:48,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:00:48,217 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 14:00:48,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:48,219 INFO L225 Difference]: With dead ends: 391 [2021-06-05 14:00:48,219 INFO L226 Difference]: Without dead ends: 391 [2021-06-05 14:00:48,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:48,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-05 14:00:48,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 256. [2021-06-05 14:00:48,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.9686274509803923) internal successors, (757), 255 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:48,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 757 transitions. [2021-06-05 14:00:48,224 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 757 transitions. Word has length 17 [2021-06-05 14:00:48,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:48,225 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 757 transitions. [2021-06-05 14:00:48,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:48,225 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 757 transitions. [2021-06-05 14:00:48,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:48,225 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:48,225 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:48,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1070 [2021-06-05 14:00:48,448 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:48,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:48,448 INFO L82 PathProgramCache]: Analyzing trace with hash -412493429, now seen corresponding path program 84 times [2021-06-05 14:00:48,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:48,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083341166] [2021-06-05 14:00:48,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:48,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:48,486 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:48,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:48,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083341166] [2021-06-05 14:00:48,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083341166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:48,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336973847] [2021-06-05 14:00:48,487 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 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 14:00:48,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:00:48,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:48,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:48,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:48,548 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:48,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336973847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:48,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:48,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 14:00:48,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483091010] [2021-06-05 14:00:48,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:00:48,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:48,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:00:48,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:00:48,550 INFO L87 Difference]: Start difference. First operand 256 states and 757 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:48,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:48,651 INFO L93 Difference]: Finished difference Result 374 states and 958 transitions. [2021-06-05 14:00:48,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:00:48,652 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 14:00:48,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:48,653 INFO L225 Difference]: With dead ends: 374 [2021-06-05 14:00:48,653 INFO L226 Difference]: Without dead ends: 372 [2021-06-05 14:00:48,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:00:48,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-06-05 14:00:48,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 269. [2021-06-05 14:00:48,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.003731343283582) internal successors, (805), 268 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:48,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 805 transitions. [2021-06-05 14:00:48,659 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 805 transitions. Word has length 17 [2021-06-05 14:00:48,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:48,659 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 805 transitions. [2021-06-05 14:00:48,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:48,659 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 805 transitions. [2021-06-05 14:00:48,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:48,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:48,660 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:48,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1071,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:48,877 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:48,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:48,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1101103778, now seen corresponding path program 85 times [2021-06-05 14:00:48,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:48,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237160323] [2021-06-05 14:00:48,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:48,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:48,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:48,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237160323] [2021-06-05 14:00:48,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237160323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:48,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172031941] [2021-06-05 14:00:48,929 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 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 14:00:48,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:48,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:48,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:48,994 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:48,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172031941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:48,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:48,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 14:00:48,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733022242] [2021-06-05 14:00:48,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:00:48,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:48,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:00:48,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:00:48,995 INFO L87 Difference]: Start difference. First operand 269 states and 805 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:49,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:49,085 INFO L93 Difference]: Finished difference Result 394 states and 1025 transitions. [2021-06-05 14:00:49,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:00:49,086 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 14:00:49,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:49,087 INFO L225 Difference]: With dead ends: 394 [2021-06-05 14:00:49,087 INFO L226 Difference]: Without dead ends: 392 [2021-06-05 14:00:49,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:00:49,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-05 14:00:49,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 269. [2021-06-05 14:00:49,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.0) internal successors, (804), 268 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:49,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 804 transitions. [2021-06-05 14:00:49,092 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 804 transitions. Word has length 17 [2021-06-05 14:00:49,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:49,092 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 804 transitions. [2021-06-05 14:00:49,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:49,092 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 804 transitions. [2021-06-05 14:00:49,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:49,093 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:49,093 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:49,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1072 [2021-06-05 14:00:49,316 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:49,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:49,317 INFO L82 PathProgramCache]: Analyzing trace with hash 439839995, now seen corresponding path program 86 times [2021-06-05 14:00:49,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:49,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423098571] [2021-06-05 14:00:49,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:49,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:49,375 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:49,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:49,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423098571] [2021-06-05 14:00:49,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423098571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:49,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746500546] [2021-06-05 14:00:49,376 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 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 14:00:49,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:49,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:49,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:49,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:49,449 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:49,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746500546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:49,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:49,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 14:00:49,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846617285] [2021-06-05 14:00:49,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:00:49,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:49,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:00:49,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:00:49,450 INFO L87 Difference]: Start difference. First operand 269 states and 804 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:49,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:49,504 INFO L93 Difference]: Finished difference Result 362 states and 940 transitions. [2021-06-05 14:00:49,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:00:49,505 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 14:00:49,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:49,506 INFO L225 Difference]: With dead ends: 362 [2021-06-05 14:00:49,506 INFO L226 Difference]: Without dead ends: 362 [2021-06-05 14:00:49,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:49,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-05 14:00:49,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 249. [2021-06-05 14:00:49,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.963709677419355) internal successors, (735), 248 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:49,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 735 transitions. [2021-06-05 14:00:49,512 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 735 transitions. Word has length 17 [2021-06-05 14:00:49,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:49,512 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 735 transitions. [2021-06-05 14:00:49,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:49,512 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 735 transitions. [2021-06-05 14:00:49,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:49,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:49,512 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:49,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1073,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:49,735 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:49,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:49,735 INFO L82 PathProgramCache]: Analyzing trace with hash -672474590, now seen corresponding path program 87 times [2021-06-05 14:00:49,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:49,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861245769] [2021-06-05 14:00:49,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:49,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:49,809 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:49,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:49,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861245769] [2021-06-05 14:00:49,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861245769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:49,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715679778] [2021-06-05 14:00:49,809 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 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 14:00:49,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:00:49,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:49,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:49,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:49,965 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:49,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715679778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:49,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:49,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:00:49,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496374263] [2021-06-05 14:00:49,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:49,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:49,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:49,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:49,966 INFO L87 Difference]: Start difference. First operand 249 states and 735 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:50,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:50,208 INFO L93 Difference]: Finished difference Result 356 states and 958 transitions. [2021-06-05 14:00:50,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:00:50,209 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-06-05 14:00:50,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:50,210 INFO L225 Difference]: With dead ends: 356 [2021-06-05 14:00:50,210 INFO L226 Difference]: Without dead ends: 346 [2021-06-05 14:00:50,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 121.3ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:50,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-05 14:00:50,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 263. [2021-06-05 14:00:50,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 3.0) internal successors, (786), 262 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:50,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 786 transitions. [2021-06-05 14:00:50,215 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 786 transitions. Word has length 17 [2021-06-05 14:00:50,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:50,215 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 786 transitions. [2021-06-05 14:00:50,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:50,215 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 786 transitions. [2021-06-05 14:00:50,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:50,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:50,218 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:50,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1074,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:50,437 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:50,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:50,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1083164229, now seen corresponding path program 88 times [2021-06-05 14:00:50,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:50,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750466730] [2021-06-05 14:00:50,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:50,496 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:50,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:50,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750466730] [2021-06-05 14:00:50,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750466730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:50,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817377071] [2021-06-05 14:00:50,496 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 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 14:00:50,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:50,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:50,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:50,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:50,603 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:50,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817377071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:50,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:50,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:00:50,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43297747] [2021-06-05 14:00:50,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:50,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:50,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:50,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:50,604 INFO L87 Difference]: Start difference. First operand 263 states and 786 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:50,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:50,687 INFO L93 Difference]: Finished difference Result 358 states and 949 transitions. [2021-06-05 14:00:50,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:00:50,688 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-06-05 14:00:50,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:50,693 INFO L225 Difference]: With dead ends: 358 [2021-06-05 14:00:50,693 INFO L226 Difference]: Without dead ends: 358 [2021-06-05 14:00:50,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:00:50,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-05 14:00:50,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 264. [2021-06-05 14:00:50,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.9961977186311786) internal successors, (788), 263 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:50,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 788 transitions. [2021-06-05 14:00:50,698 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 788 transitions. Word has length 17 [2021-06-05 14:00:50,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:50,698 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 788 transitions. [2021-06-05 14:00:50,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:50,698 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 788 transitions. [2021-06-05 14:00:50,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:50,698 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:50,699 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:50,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1075,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:50,917 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:50,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:50,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1724553762, now seen corresponding path program 89 times [2021-06-05 14:00:50,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:50,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080168272] [2021-06-05 14:00:50,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:50,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:50,990 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:50,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:50,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080168272] [2021-06-05 14:00:50,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080168272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:50,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544863501] [2021-06-05 14:00:50,990 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 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 14:00:51,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:00:51,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:51,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:51,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:51,088 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:51,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544863501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:51,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:51,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:00:51,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269855666] [2021-06-05 14:00:51,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:00:51,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:51,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:00:51,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:51,089 INFO L87 Difference]: Start difference. First operand 264 states and 788 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:00:51,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:51,198 INFO L93 Difference]: Finished difference Result 377 states and 1000 transitions. [2021-06-05 14:00:51,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:00:51,198 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-06-05 14:00:51,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:51,200 INFO L225 Difference]: With dead ends: 377 [2021-06-05 14:00:51,200 INFO L226 Difference]: Without dead ends: 369 [2021-06-05 14:00:51,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 96.6ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:00:51,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-05 14:00:51,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 264. [2021-06-05 14:00:51,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.9923954372623576) internal successors, (787), 263 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:51,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 787 transitions. [2021-06-05 14:00:51,208 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 787 transitions. Word has length 17 [2021-06-05 14:00:51,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:51,208 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 787 transitions. [2021-06-05 14:00:51,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:00:51,208 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 787 transitions. [2021-06-05 14:00:51,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:51,209 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:51,209 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:51,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1076,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:51,429 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:51,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:51,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1589510495, now seen corresponding path program 90 times [2021-06-05 14:00:51,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:51,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106660147] [2021-06-05 14:00:51,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:51,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:51,489 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:51,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:51,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106660147] [2021-06-05 14:00:51,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106660147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:51,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205527163] [2021-06-05 14:00:51,489 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 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 14:00:51,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:00:51,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:51,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:51,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:51,558 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:51,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205527163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:51,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:51,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:00:51,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099192558] [2021-06-05 14:00:51,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:00:51,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:51,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:00:51,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:51,559 INFO L87 Difference]: Start difference. First operand 264 states and 787 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:00:51,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:51,701 INFO L93 Difference]: Finished difference Result 370 states and 949 transitions. [2021-06-05 14:00:51,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:00:51,702 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-06-05 14:00:51,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:51,703 INFO L225 Difference]: With dead ends: 370 [2021-06-05 14:00:51,703 INFO L226 Difference]: Without dead ends: 370 [2021-06-05 14:00:51,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:00:51,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-06-05 14:00:51,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 258. [2021-06-05 14:00:51,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.992217898832685) internal successors, (769), 257 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:51,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 769 transitions. [2021-06-05 14:00:51,708 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 769 transitions. Word has length 17 [2021-06-05 14:00:51,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:51,708 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 769 transitions. [2021-06-05 14:00:51,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:00:51,708 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 769 transitions. [2021-06-05 14:00:51,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:51,708 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:51,708 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:51,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1077,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:51,917 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:51,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:51,917 INFO L82 PathProgramCache]: Analyzing trace with hash 20730274, now seen corresponding path program 91 times [2021-06-05 14:00:51,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:51,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657334776] [2021-06-05 14:00:51,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:51,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:51,979 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:51,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:51,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657334776] [2021-06-05 14:00:51,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657334776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:51,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822028829] [2021-06-05 14:00:51,979 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 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 14:00:52,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:52,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:52,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:52,053 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:52,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822028829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:52,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:52,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:00:52,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484213961] [2021-06-05 14:00:52,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:00:52,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:52,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:00:52,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:52,054 INFO L87 Difference]: Start difference. First operand 258 states and 769 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:00:52,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:52,124 INFO L93 Difference]: Finished difference Result 319 states and 889 transitions. [2021-06-05 14:00:52,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:00:52,124 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-06-05 14:00:52,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:52,125 INFO L225 Difference]: With dead ends: 319 [2021-06-05 14:00:52,125 INFO L226 Difference]: Without dead ends: 309 [2021-06-05 14:00:52,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:00:52,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-06-05 14:00:52,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 258. [2021-06-05 14:00:52,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.9883268482490273) internal successors, (768), 257 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:52,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 768 transitions. [2021-06-05 14:00:52,131 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 768 transitions. Word has length 17 [2021-06-05 14:00:52,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:52,131 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 768 transitions. [2021-06-05 14:00:52,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:00:52,131 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 768 transitions. [2021-06-05 14:00:52,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:52,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:52,132 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:52,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1078 [2021-06-05 14:00:52,355 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:52,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:52,355 INFO L82 PathProgramCache]: Analyzing trace with hash -106375557, now seen corresponding path program 92 times [2021-06-05 14:00:52,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:52,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6957947] [2021-06-05 14:00:52,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:52,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:52,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:52,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6957947] [2021-06-05 14:00:52,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6957947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:52,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844191628] [2021-06-05 14:00:52,427 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 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 14:00:52,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:52,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:52,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:52,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:52,510 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:52,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844191628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:52,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:52,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:00:52,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089553175] [2021-06-05 14:00:52,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:00:52,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:52,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:00:52,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:52,511 INFO L87 Difference]: Start difference. First operand 258 states and 768 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:00:52,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:52,666 INFO L93 Difference]: Finished difference Result 377 states and 992 transitions. [2021-06-05 14:00:52,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:00:52,666 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-06-05 14:00:52,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:52,667 INFO L225 Difference]: With dead ends: 377 [2021-06-05 14:00:52,667 INFO L226 Difference]: Without dead ends: 377 [2021-06-05 14:00:52,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 140.7ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:00:52,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-06-05 14:00:52,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 266. [2021-06-05 14:00:52,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.9849056603773585) internal successors, (791), 265 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:52,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 791 transitions. [2021-06-05 14:00:52,672 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 791 transitions. Word has length 17 [2021-06-05 14:00:52,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:52,672 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 791 transitions. [2021-06-05 14:00:52,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:00:52,673 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 791 transitions. [2021-06-05 14:00:52,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:52,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:52,673 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:52,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1079 [2021-06-05 14:00:52,885 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:52,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:52,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1130090568, now seen corresponding path program 93 times [2021-06-05 14:00:52,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:52,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36497554] [2021-06-05 14:00:52,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:52,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:52,970 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:52,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:52,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36497554] [2021-06-05 14:00:52,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36497554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:52,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788295978] [2021-06-05 14:00:52,971 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 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 14:00:53,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:00:53,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:53,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:53,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:53,067 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:53,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788295978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:53,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:53,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:00:53,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668269201] [2021-06-05 14:00:53,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:53,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:53,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:53,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:53,068 INFO L87 Difference]: Start difference. First operand 266 states and 791 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:53,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:53,125 INFO L93 Difference]: Finished difference Result 455 states and 1181 transitions. [2021-06-05 14:00:53,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:00:53,126 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-06-05 14:00:53,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:53,127 INFO L225 Difference]: With dead ends: 455 [2021-06-05 14:00:53,127 INFO L226 Difference]: Without dead ends: 455 [2021-06-05 14:00:53,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:53,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-06-05 14:00:53,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 307. [2021-06-05 14:00:53,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.0784313725490198) internal successors, (942), 306 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:53,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 942 transitions. [2021-06-05 14:00:53,150 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 942 transitions. Word has length 17 [2021-06-05 14:00:53,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:53,150 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 942 transitions. [2021-06-05 14:00:53,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:53,150 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 942 transitions. [2021-06-05 14:00:53,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:53,150 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:53,151 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:53,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1080 [2021-06-05 14:00:53,373 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:53,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:53,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1048960283, now seen corresponding path program 94 times [2021-06-05 14:00:53,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:53,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77296771] [2021-06-05 14:00:53,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:53,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:53,423 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:53,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:53,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77296771] [2021-06-05 14:00:53,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77296771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:53,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233408126] [2021-06-05 14:00:53,424 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 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 14:00:53,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:53,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:53,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:53,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:53,480 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:53,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233408126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:53,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:53,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:00:53,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282830291] [2021-06-05 14:00:53,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:53,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:53,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:53,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:53,481 INFO L87 Difference]: Start difference. First operand 307 states and 942 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:53,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:53,601 INFO L93 Difference]: Finished difference Result 448 states and 1182 transitions. [2021-06-05 14:00:53,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:00:53,601 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-06-05 14:00:53,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:53,602 INFO L225 Difference]: With dead ends: 448 [2021-06-05 14:00:53,602 INFO L226 Difference]: Without dead ends: 446 [2021-06-05 14:00:53,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:53,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-05 14:00:53,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 320. [2021-06-05 14:00:53,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 3.109717868338558) internal successors, (992), 319 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:53,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 992 transitions. [2021-06-05 14:00:53,620 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 992 transitions. Word has length 17 [2021-06-05 14:00:53,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:53,620 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 992 transitions. [2021-06-05 14:00:53,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:53,621 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 992 transitions. [2021-06-05 14:00:53,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:53,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:53,621 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:53,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1081,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:53,840 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:53,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:53,840 INFO L82 PathProgramCache]: Analyzing trace with hash 464636924, now seen corresponding path program 95 times [2021-06-05 14:00:53,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:53,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592359171] [2021-06-05 14:00:53,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:53,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:53,921 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:53,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:53,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592359171] [2021-06-05 14:00:53,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592359171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:53,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248442996] [2021-06-05 14:00:53,921 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 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 14:00:54,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:00:54,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:54,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:54,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:54,040 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:54,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248442996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:54,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:54,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:00:54,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504579452] [2021-06-05 14:00:54,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:54,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:54,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:54,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:54,041 INFO L87 Difference]: Start difference. First operand 320 states and 992 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:54,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:54,152 INFO L93 Difference]: Finished difference Result 458 states and 1214 transitions. [2021-06-05 14:00:54,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:00:54,152 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-06-05 14:00:54,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:54,153 INFO L225 Difference]: With dead ends: 458 [2021-06-05 14:00:54,153 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 14:00:54,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 85.5ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:54,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 14:00:54,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 309. [2021-06-05 14:00:54,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.0779220779220777) internal successors, (948), 308 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:54,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 948 transitions. [2021-06-05 14:00:54,168 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 948 transitions. Word has length 17 [2021-06-05 14:00:54,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:54,168 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 948 transitions. [2021-06-05 14:00:54,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:54,168 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 948 transitions. [2021-06-05 14:00:54,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:54,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:54,169 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:54,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1082,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:54,384 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:54,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:54,384 INFO L82 PathProgramCache]: Analyzing trace with hash -196626859, now seen corresponding path program 96 times [2021-06-05 14:00:54,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:54,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196860137] [2021-06-05 14:00:54,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:54,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:54,451 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:54,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:54,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196860137] [2021-06-05 14:00:54,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196860137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:54,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084348136] [2021-06-05 14:00:54,452 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 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 14:00:54,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:00:54,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:54,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:54,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:54,542 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:54,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084348136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:54,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:54,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:00:54,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398116076] [2021-06-05 14:00:54,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:54,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:54,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:54,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:54,543 INFO L87 Difference]: Start difference. First operand 309 states and 948 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:54,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:54,609 INFO L93 Difference]: Finished difference Result 433 states and 1138 transitions. [2021-06-05 14:00:54,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:00:54,609 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-06-05 14:00:54,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:54,610 INFO L225 Difference]: With dead ends: 433 [2021-06-05 14:00:54,610 INFO L226 Difference]: Without dead ends: 433 [2021-06-05 14:00:54,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:00:54,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-06-05 14:00:54,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 312. [2021-06-05 14:00:54,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.0707395498392285) internal successors, (955), 311 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:54,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 955 transitions. [2021-06-05 14:00:54,615 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 955 transitions. Word has length 17 [2021-06-05 14:00:54,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:54,615 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 955 transitions. [2021-06-05 14:00:54,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:54,615 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 955 transitions. [2021-06-05 14:00:54,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:54,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:54,616 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:54,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1083 [2021-06-05 14:00:54,833 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:54,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:54,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1080301240, now seen corresponding path program 97 times [2021-06-05 14:00:54,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:54,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507901440] [2021-06-05 14:00:54,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:54,877 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:54,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:54,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507901440] [2021-06-05 14:00:54,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507901440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:54,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693089466] [2021-06-05 14:00:54,877 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 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 14:00:54,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:54,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:54,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:54,937 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:54,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693089466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:54,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:54,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:00:54,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511042621] [2021-06-05 14:00:54,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:54,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:54,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:54,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:54,938 INFO L87 Difference]: Start difference. First operand 312 states and 955 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:55,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:55,037 INFO L93 Difference]: Finished difference Result 472 states and 1273 transitions. [2021-06-05 14:00:55,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:00:55,037 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-06-05 14:00:55,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:55,038 INFO L225 Difference]: With dead ends: 472 [2021-06-05 14:00:55,038 INFO L226 Difference]: Without dead ends: 468 [2021-06-05 14:00:55,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:55,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-06-05 14:00:55,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 310. [2021-06-05 14:00:55,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.071197411003236) internal successors, (949), 309 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:55,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 949 transitions. [2021-06-05 14:00:55,070 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 949 transitions. Word has length 17 [2021-06-05 14:00:55,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:55,070 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 949 transitions. [2021-06-05 14:00:55,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:55,070 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 949 transitions. [2021-06-05 14:00:55,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:55,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:55,070 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:55,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1084,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:55,285 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:55,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:55,285 INFO L82 PathProgramCache]: Analyzing trace with hash 2037480635, now seen corresponding path program 98 times [2021-06-05 14:00:55,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:55,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332098576] [2021-06-05 14:00:55,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:55,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:55,342 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:55,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:55,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332098576] [2021-06-05 14:00:55,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332098576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:55,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876866685] [2021-06-05 14:00:55,343 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 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 14:00:55,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:55,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:55,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:55,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:55,405 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:55,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876866685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:55,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:55,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:00:55,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582132519] [2021-06-05 14:00:55,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:55,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:55,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:55,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:55,406 INFO L87 Difference]: Start difference. First operand 310 states and 949 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:55,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:55,481 INFO L93 Difference]: Finished difference Result 407 states and 1107 transitions. [2021-06-05 14:00:55,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:00:55,482 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-06-05 14:00:55,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:55,483 INFO L225 Difference]: With dead ends: 407 [2021-06-05 14:00:55,483 INFO L226 Difference]: Without dead ends: 407 [2021-06-05 14:00:55,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:00:55,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-06-05 14:00:55,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 318. [2021-06-05 14:00:55,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 3.0757097791798107) internal successors, (975), 317 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:55,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 975 transitions. [2021-06-05 14:00:55,488 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 975 transitions. Word has length 17 [2021-06-05 14:00:55,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:55,489 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 975 transitions. [2021-06-05 14:00:55,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:55,489 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 975 transitions. [2021-06-05 14:00:55,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:55,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:55,489 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:55,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1085,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:55,705 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:55,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:55,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1308941444, now seen corresponding path program 99 times [2021-06-05 14:00:55,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:55,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753390456] [2021-06-05 14:00:55,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:55,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:55,746 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:55,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:55,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753390456] [2021-06-05 14:00:55,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753390456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:55,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699394143] [2021-06-05 14:00:55,747 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 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 14:00:55,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:00:55,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:55,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:55,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:55,809 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:55,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699394143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:55,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:55,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 14:00:55,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250257449] [2021-06-05 14:00:55,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:00:55,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:55,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:00:55,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:00:55,811 INFO L87 Difference]: Start difference. First operand 318 states and 975 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:55,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:55,933 INFO L93 Difference]: Finished difference Result 452 states and 1242 transitions. [2021-06-05 14:00:55,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:00:55,934 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2021-06-05 14:00:55,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:55,935 INFO L225 Difference]: With dead ends: 452 [2021-06-05 14:00:55,935 INFO L226 Difference]: Without dead ends: 446 [2021-06-05 14:00:55,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:00:55,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-05 14:00:55,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 318. [2021-06-05 14:00:55,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 3.0725552050473186) internal successors, (974), 317 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:55,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 974 transitions. [2021-06-05 14:00:55,941 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 974 transitions. Word has length 17 [2021-06-05 14:00:55,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:55,941 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 974 transitions. [2021-06-05 14:00:55,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 14:00:55,941 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 974 transitions. [2021-06-05 14:00:55,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:55,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:55,942 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:56,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1086,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:56,162 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:56,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:56,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1933946680, now seen corresponding path program 100 times [2021-06-05 14:00:56,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:56,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549380212] [2021-06-05 14:00:56,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:56,205 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:56,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:56,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549380212] [2021-06-05 14:00:56,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549380212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:56,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942540571] [2021-06-05 14:00:56,206 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 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 14:00:56,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:56,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:56,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:56,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:56,289 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:56,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942540571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:56,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:56,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:00:56,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268337203] [2021-06-05 14:00:56,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:00:56,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:56,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:00:56,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:56,290 INFO L87 Difference]: Start difference. First operand 318 states and 974 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:00:56,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:56,407 INFO L93 Difference]: Finished difference Result 444 states and 1227 transitions. [2021-06-05 14:00:56,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:00:56,408 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-06-05 14:00:56,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:56,408 INFO L225 Difference]: With dead ends: 444 [2021-06-05 14:00:56,408 INFO L226 Difference]: Without dead ends: 436 [2021-06-05 14:00:56,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:56,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-05 14:00:56,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 332. [2021-06-05 14:00:56,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.090634441087613) internal successors, (1023), 331 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:56,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1023 transitions. [2021-06-05 14:00:56,413 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1023 transitions. Word has length 17 [2021-06-05 14:00:56,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:56,413 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1023 transitions. [2021-06-05 14:00:56,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:00:56,413 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1023 transitions. [2021-06-05 14:00:56,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:56,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:56,414 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:56,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1087,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:56,637 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:56,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:56,637 INFO L82 PathProgramCache]: Analyzing trace with hash 2068989947, now seen corresponding path program 101 times [2021-06-05 14:00:56,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:56,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722709862] [2021-06-05 14:00:56,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:56,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:56,682 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:56,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:56,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722709862] [2021-06-05 14:00:56,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722709862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:56,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015368410] [2021-06-05 14:00:56,682 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 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 14:00:56,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:00:56,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:56,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:56,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:56,762 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:56,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015368410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:56,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:56,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:00:56,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284741365] [2021-06-05 14:00:56,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:00:56,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:56,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:00:56,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:56,763 INFO L87 Difference]: Start difference. First operand 332 states and 1023 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:00:56,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:56,874 INFO L93 Difference]: Finished difference Result 419 states and 1186 transitions. [2021-06-05 14:00:56,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:00:56,874 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-06-05 14:00:56,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:56,875 INFO L225 Difference]: With dead ends: 419 [2021-06-05 14:00:56,875 INFO L226 Difference]: Without dead ends: 419 [2021-06-05 14:00:56,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 96.6ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:00:56,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-06-05 14:00:56,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 347. [2021-06-05 14:00:56,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.0895953757225434) internal successors, (1069), 346 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:56,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1069 transitions. [2021-06-05 14:00:56,881 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1069 transitions. Word has length 17 [2021-06-05 14:00:56,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:56,881 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1069 transitions. [2021-06-05 14:00:56,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:00:56,881 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1069 transitions. [2021-06-05 14:00:56,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:56,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:56,881 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:57,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1088 [2021-06-05 14:00:57,082 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:57,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:57,082 INFO L82 PathProgramCache]: Analyzing trace with hash -615736580, now seen corresponding path program 102 times [2021-06-05 14:00:57,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:57,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892248889] [2021-06-05 14:00:57,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:57,134 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:57,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:57,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892248889] [2021-06-05 14:00:57,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892248889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:57,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494320878] [2021-06-05 14:00:57,134 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 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 14:00:57,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:00:57,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:57,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:57,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:57,199 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:57,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494320878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:57,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:57,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:00:57,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209612371] [2021-06-05 14:00:57,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:00:57,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:57,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:00:57,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:57,200 INFO L87 Difference]: Start difference. First operand 347 states and 1069 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:00:57,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:57,266 INFO L93 Difference]: Finished difference Result 413 states and 1199 transitions. [2021-06-05 14:00:57,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:00:57,284 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-06-05 14:00:57,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:57,286 INFO L225 Difference]: With dead ends: 413 [2021-06-05 14:00:57,286 INFO L226 Difference]: Without dead ends: 403 [2021-06-05 14:00:57,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:00:57,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-06-05 14:00:57,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 347. [2021-06-05 14:00:57,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.086705202312139) internal successors, (1068), 346 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:57,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1068 transitions. [2021-06-05 14:00:57,290 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1068 transitions. Word has length 17 [2021-06-05 14:00:57,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:57,290 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1068 transitions. [2021-06-05 14:00:57,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:00:57,291 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1068 transitions. [2021-06-05 14:00:57,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:57,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:57,291 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:57,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1089 [2021-06-05 14:00:57,513 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:57,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:57,513 INFO L82 PathProgramCache]: Analyzing trace with hash -742842411, now seen corresponding path program 103 times [2021-06-05 14:00:57,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:57,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052045039] [2021-06-05 14:00:57,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:57,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:57,583 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:57,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:57,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052045039] [2021-06-05 14:00:57,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052045039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:57,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874411167] [2021-06-05 14:00:57,584 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 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 14:00:57,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:57,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:57,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:57,650 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:57,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874411167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:57,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:57,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:00:57,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850925805] [2021-06-05 14:00:57,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:00:57,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:57,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:00:57,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:57,651 INFO L87 Difference]: Start difference. First operand 347 states and 1068 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:00:57,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:57,775 INFO L93 Difference]: Finished difference Result 418 states and 1194 transitions. [2021-06-05 14:00:57,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:00:57,775 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-06-05 14:00:57,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:57,776 INFO L225 Difference]: With dead ends: 418 [2021-06-05 14:00:57,776 INFO L226 Difference]: Without dead ends: 418 [2021-06-05 14:00:57,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 129.9ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:00:57,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-06-05 14:00:57,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 347. [2021-06-05 14:00:57,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.086705202312139) internal successors, (1068), 346 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:57,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1068 transitions. [2021-06-05 14:00:57,781 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1068 transitions. Word has length 17 [2021-06-05 14:00:57,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:57,782 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1068 transitions. [2021-06-05 14:00:57,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:00:57,782 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1068 transitions. [2021-06-05 14:00:57,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:57,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:57,782 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:58,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1090 [2021-06-05 14:00:58,003 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:58,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:58,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1948460984, now seen corresponding path program 104 times [2021-06-05 14:00:58,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:58,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973237747] [2021-06-05 14:00:58,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:58,053 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:58,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:58,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973237747] [2021-06-05 14:00:58,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973237747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:58,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681883708] [2021-06-05 14:00:58,054 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 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 14:00:58,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:58,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:58,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:58,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:58,120 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:58,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681883708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:58,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:58,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:00:58,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298824453] [2021-06-05 14:00:58,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:00:58,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:58,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:00:58,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:58,121 INFO L87 Difference]: Start difference. First operand 347 states and 1068 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:00:58,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:58,172 INFO L93 Difference]: Finished difference Result 411 states and 1195 transitions. [2021-06-05 14:00:58,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:00:58,172 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-06-05 14:00:58,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:58,173 INFO L225 Difference]: With dead ends: 411 [2021-06-05 14:00:58,173 INFO L226 Difference]: Without dead ends: 399 [2021-06-05 14:00:58,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:00:58,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-06-05 14:00:58,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 345. [2021-06-05 14:00:58,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.0930232558139537) internal successors, (1064), 344 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:58,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1064 transitions. [2021-06-05 14:00:58,188 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1064 transitions. Word has length 17 [2021-06-05 14:00:58,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:58,188 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1064 transitions. [2021-06-05 14:00:58,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:00:58,188 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1064 transitions. [2021-06-05 14:00:58,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:00:58,189 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:58,189 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:58,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1091,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:58,409 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:58,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:58,409 INFO L82 PathProgramCache]: Analyzing trace with hash -2010299589, now seen corresponding path program 105 times [2021-06-05 14:00:58,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:58,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392455330] [2021-06-05 14:00:58,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:58,476 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:58,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:58,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392455330] [2021-06-05 14:00:58,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392455330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:58,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22601321] [2021-06-05 14:00:58,476 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 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 14:00:58,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:00:58,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:58,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:00:58,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:58,789 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:58,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22601321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:58,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:58,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 14:00:58,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367198668] [2021-06-05 14:00:58,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:00:58,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:58,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:00:58,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:00:58,790 INFO L87 Difference]: Start difference. First operand 345 states and 1064 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:00:58,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:58,920 INFO L93 Difference]: Finished difference Result 476 states and 1343 transitions. [2021-06-05 14:00:58,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:00:58,920 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 17 [2021-06-05 14:00:58,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:58,921 INFO L225 Difference]: With dead ends: 476 [2021-06-05 14:00:58,921 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 14:00:58,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 143.2ms TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:00:58,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 14:00:58,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 355. [2021-06-05 14:00:58,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.0819209039548023) internal successors, (1091), 354 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:58,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1091 transitions. [2021-06-05 14:00:58,928 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1091 transitions. Word has length 17 [2021-06-05 14:00:58,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:58,928 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1091 transitions. [2021-06-05 14:00:58,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 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 14:00:58,928 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1091 transitions. [2021-06-05 14:00:58,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:00:58,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:58,929 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:59,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1092,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:59,150 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:59,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:59,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1640906887, now seen corresponding path program 106 times [2021-06-05 14:00:59,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:59,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871398726] [2021-06-05 14:00:59,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:59,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:59,295 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:59,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:59,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871398726] [2021-06-05 14:00:59,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871398726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:59,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833627297] [2021-06-05 14:00:59,296 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 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 14:00:59,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:59,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:59,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:00:59,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:59,669 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:59,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:00,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:00,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:00,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:01:00,113 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 14:01:00,117 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:00,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833627297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:00,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:00,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:01:00,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001166325] [2021-06-05 14:01:00,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:01:00,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:00,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:01:00,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:01:00,118 INFO L87 Difference]: Start difference. First operand 355 states and 1091 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:01:00,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:00,428 INFO L93 Difference]: Finished difference Result 425 states and 1234 transitions. [2021-06-05 14:01:00,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:01:00,428 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-05 14:01:00,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:00,429 INFO L225 Difference]: With dead ends: 425 [2021-06-05 14:01:00,430 INFO L226 Difference]: Without dead ends: 398 [2021-06-05 14:01:00,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 438.0ms TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:01:00,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-06-05 14:01:00,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 369. [2021-06-05 14:01:00,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.078804347826087) internal successors, (1133), 368 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:00,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1133 transitions. [2021-06-05 14:01:00,435 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1133 transitions. Word has length 18 [2021-06-05 14:01:00,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:00,436 INFO L482 AbstractCegarLoop]: Abstraction has 369 states and 1133 transitions. [2021-06-05 14:01:00,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:01:00,436 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1133 transitions. [2021-06-05 14:01:00,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:01:00,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:00,436 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:00,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1093,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:00,659 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:00,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:00,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1149194617, now seen corresponding path program 107 times [2021-06-05 14:01:00,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:00,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566844144] [2021-06-05 14:01:00,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:00,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:00,793 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:00,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:00,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566844144] [2021-06-05 14:01:00,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566844144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:00,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879069184] [2021-06-05 14:01:00,793 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 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 14:01:00,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:01:00,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:00,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 14:01:00,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:01,197 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:01,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:01,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:01,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:01,774 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 14:01:01,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:3 [2021-06-05 14:01:01,778 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:01,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879069184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:01,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:01,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:01:01,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406146748] [2021-06-05 14:01:01,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:01:01,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:01,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:01:01,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:01:01,779 INFO L87 Difference]: Start difference. First operand 369 states and 1133 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:02,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:02,079 INFO L93 Difference]: Finished difference Result 444 states and 1291 transitions. [2021-06-05 14:01:02,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:01:02,080 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 18 [2021-06-05 14:01:02,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:02,081 INFO L225 Difference]: With dead ends: 444 [2021-06-05 14:01:02,081 INFO L226 Difference]: Without dead ends: 428 [2021-06-05 14:01:02,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 377.6ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:01:02,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-06-05 14:01:02,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 384. [2021-06-05 14:01:02,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.093994778067885) internal successors, (1185), 383 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:02,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1185 transitions. [2021-06-05 14:01:02,086 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1185 transitions. Word has length 18 [2021-06-05 14:01:02,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:02,087 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1185 transitions. [2021-06-05 14:01:02,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:02,087 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1185 transitions. [2021-06-05 14:01:02,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:01:02,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:02,087 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:02,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1202 [2021-06-05 14:01:02,301 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:02,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:02,301 INFO L82 PathProgramCache]: Analyzing trace with hash -405611257, now seen corresponding path program 108 times [2021-06-05 14:01:02,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:02,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055498935] [2021-06-05 14:01:02,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:02,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:02,406 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:02,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:02,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055498935] [2021-06-05 14:01:02,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055498935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:02,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873505632] [2021-06-05 14:01:02,407 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 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 14:01:02,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:01:02,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:02,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:01:02,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:02,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:02,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:03,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:03,363 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:03,363 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:03,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:03,517 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:03,520 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:01:03,521 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:03,537 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:03,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:03,538 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:01:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:03,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873505632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:03,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:03,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:01:03,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983302337] [2021-06-05 14:01:03,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:01:03,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:03,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:01:03,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:01:03,650 INFO L87 Difference]: Start difference. First operand 384 states and 1185 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:04,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:04,152 INFO L93 Difference]: Finished difference Result 463 states and 1333 transitions. [2021-06-05 14:01:04,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:01:04,152 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 18 [2021-06-05 14:01:04,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:04,153 INFO L225 Difference]: With dead ends: 463 [2021-06-05 14:01:04,153 INFO L226 Difference]: Without dead ends: 453 [2021-06-05 14:01:04,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 323.6ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:01:04,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-05 14:01:04,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 384. [2021-06-05 14:01:04,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.093994778067885) internal successors, (1185), 383 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:04,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1185 transitions. [2021-06-05 14:01:04,159 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1185 transitions. Word has length 18 [2021-06-05 14:01:04,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:04,159 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1185 transitions. [2021-06-05 14:01:04,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:04,159 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1185 transitions. [2021-06-05 14:01:04,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:01:04,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:04,160 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:04,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1295,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:04,373 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:04,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:04,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1622768455, now seen corresponding path program 109 times [2021-06-05 14:01:04,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:04,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108827010] [2021-06-05 14:01:04,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:04,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:04,466 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:04,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:04,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108827010] [2021-06-05 14:01:04,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108827010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:04,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796907465] [2021-06-05 14:01:04,466 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 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 14:01:04,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:04,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:01:04,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:04,840 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:04,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:05,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:05,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:05,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:01:05,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 14:01:05,089 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:05,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796907465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:05,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:05,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:01:05,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432457873] [2021-06-05 14:01:05,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:01:05,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:05,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:01:05,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:01:05,090 INFO L87 Difference]: Start difference. First operand 384 states and 1185 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:05,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:05,458 INFO L93 Difference]: Finished difference Result 479 states and 1440 transitions. [2021-06-05 14:01:05,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:01:05,458 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 18 [2021-06-05 14:01:05,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:05,459 INFO L225 Difference]: With dead ends: 479 [2021-06-05 14:01:05,459 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 14:01:05,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 331.9ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:01:05,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 14:01:05,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 423. [2021-06-05 14:01:05,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 3.146919431279621) internal successors, (1328), 422 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:05,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1328 transitions. [2021-06-05 14:01:05,466 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1328 transitions. Word has length 18 [2021-06-05 14:01:05,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:05,466 INFO L482 AbstractCegarLoop]: Abstraction has 423 states and 1328 transitions. [2021-06-05 14:01:05,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:05,467 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1328 transitions. [2021-06-05 14:01:05,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:01:05,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:05,467 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:05,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1417,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:05,691 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:05,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:05,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1928615481, now seen corresponding path program 110 times [2021-06-05 14:01:05,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:05,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719514092] [2021-06-05 14:01:05,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:05,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:05,804 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:05,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:05,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719514092] [2021-06-05 14:01:05,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719514092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:05,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726635213] [2021-06-05 14:01:05,805 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 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 14:01:05,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:01:05,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:05,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:01:05,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:06,160 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:06,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:06,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:06,565 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:06,566 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:06,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:07,314 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:07,316 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:01:07,317 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:07,334 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:07,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:07,335 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:01:07,395 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:07,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726635213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:07,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:07,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:01:07,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245407137] [2021-06-05 14:01:07,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:01:07,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:07,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:01:07,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:01:07,396 INFO L87 Difference]: Start difference. First operand 423 states and 1328 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:07,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:07,949 INFO L93 Difference]: Finished difference Result 513 states and 1501 transitions. [2021-06-05 14:01:07,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:01:07,950 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 18 [2021-06-05 14:01:07,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:07,951 INFO L225 Difference]: With dead ends: 513 [2021-06-05 14:01:07,951 INFO L226 Difference]: Without dead ends: 494 [2021-06-05 14:01:07,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 401.2ms TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:01:07,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-06-05 14:01:07,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 422. [2021-06-05 14:01:07,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 3.125890736342043) internal successors, (1316), 421 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:07,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1316 transitions. [2021-06-05 14:01:07,957 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1316 transitions. Word has length 18 [2021-06-05 14:01:07,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:07,957 INFO L482 AbstractCegarLoop]: Abstraction has 422 states and 1316 transitions. [2021-06-05 14:01:07,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:07,958 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1316 transitions. [2021-06-05 14:01:07,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:01:07,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:07,958 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:08,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1474 [2021-06-05 14:01:08,181 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:08,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:08,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1077471349, now seen corresponding path program 111 times [2021-06-05 14:01:08,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:08,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249294359] [2021-06-05 14:01:08,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:08,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:08,288 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:08,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:08,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249294359] [2021-06-05 14:01:08,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249294359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:08,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51556302] [2021-06-05 14:01:08,289 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 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 14:01:08,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:01:08,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:08,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:01:08,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:08,596 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:08,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:08,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:09,071 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:09,071 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:09,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:09,708 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:09,710 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:01:09,711 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:09,728 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:09,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:09,728 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:01:09,758 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:09,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51556302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:09,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:09,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:01:09,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078225012] [2021-06-05 14:01:09,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:01:09,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:09,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:01:09,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:01:09,759 INFO L87 Difference]: Start difference. First operand 422 states and 1316 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:10,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:10,164 INFO L93 Difference]: Finished difference Result 479 states and 1433 transitions. [2021-06-05 14:01:10,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:01:10,165 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 18 [2021-06-05 14:01:10,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:10,166 INFO L225 Difference]: With dead ends: 479 [2021-06-05 14:01:10,166 INFO L226 Difference]: Without dead ends: 469 [2021-06-05 14:01:10,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 396.6ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:01:10,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-05 14:01:10,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 424. [2021-06-05 14:01:10,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 3.1252955082742315) internal successors, (1322), 423 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:10,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1322 transitions. [2021-06-05 14:01:10,187 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1322 transitions. Word has length 18 [2021-06-05 14:01:10,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:10,187 INFO L482 AbstractCegarLoop]: Abstraction has 424 states and 1322 transitions. [2021-06-05 14:01:10,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:10,187 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1322 transitions. [2021-06-05 14:01:10,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:01:10,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:10,188 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:10,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1619,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:10,401 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:10,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:10,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1654277767, now seen corresponding path program 112 times [2021-06-05 14:01:10,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:10,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795500083] [2021-06-05 14:01:10,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:10,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:10,606 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:10,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:10,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795500083] [2021-06-05 14:01:10,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795500083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:10,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784365724] [2021-06-05 14:01:10,606 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 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 14:01:10,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:01:10,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:10,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:01:10,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:10,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:10,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:11,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:11,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:11,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:01:11,333 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 14:01:11,338 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:11,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784365724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:11,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:11,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:01:11,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001253594] [2021-06-05 14:01:11,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:01:11,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:11,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:01:11,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:01:11,339 INFO L87 Difference]: Start difference. First operand 424 states and 1322 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:11,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:11,733 INFO L93 Difference]: Finished difference Result 515 states and 1560 transitions. [2021-06-05 14:01:11,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:01:11,734 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 18 [2021-06-05 14:01:11,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:11,735 INFO L225 Difference]: With dead ends: 515 [2021-06-05 14:01:11,735 INFO L226 Difference]: Without dead ends: 499 [2021-06-05 14:01:11,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 409.7ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:01:11,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-06-05 14:01:11,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 458. [2021-06-05 14:01:11,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.1531728665207877) internal successors, (1441), 457 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:11,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1441 transitions. [2021-06-05 14:01:11,751 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1441 transitions. Word has length 18 [2021-06-05 14:01:11,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:11,751 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1441 transitions. [2021-06-05 14:01:11,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:11,751 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1441 transitions. [2021-06-05 14:01:11,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:01:11,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:11,752 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:11,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1749,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:11,973 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:11,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:11,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1897106169, now seen corresponding path program 113 times [2021-06-05 14:01:11,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:11,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800131166] [2021-06-05 14:01:11,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:11,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:12,098 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:12,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:12,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800131166] [2021-06-05 14:01:12,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800131166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:12,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12224281] [2021-06-05 14:01:12,099 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 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 14:01:12,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:01:12,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:12,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:01:12,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:12,420 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:12,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:12,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:12,960 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:12,960 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:12,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:13,197 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:13,200 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:01:13,200 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:13,216 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:13,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:13,217 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:01:13,249 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:13,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12224281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:13,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:13,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:01:13,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435824496] [2021-06-05 14:01:13,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:01:13,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:13,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:01:13,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:01:13,250 INFO L87 Difference]: Start difference. First operand 458 states and 1441 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:13,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:13,903 INFO L93 Difference]: Finished difference Result 583 states and 1699 transitions. [2021-06-05 14:01:13,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:01:13,904 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 18 [2021-06-05 14:01:13,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:13,913 INFO L225 Difference]: With dead ends: 583 [2021-06-05 14:01:13,914 INFO L226 Difference]: Without dead ends: 557 [2021-06-05 14:01:13,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 506.0ms TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:01:13,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-06-05 14:01:13,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 462. [2021-06-05 14:01:13,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 3.1496746203904555) internal successors, (1452), 461 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:13,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1452 transitions. [2021-06-05 14:01:13,923 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1452 transitions. Word has length 18 [2021-06-05 14:01:13,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:13,923 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 1452 transitions. [2021-06-05 14:01:13,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:13,923 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1452 transitions. [2021-06-05 14:01:13,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:01:13,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:13,924 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:14,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1808 [2021-06-05 14:01:14,145 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:14,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:14,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1045962037, now seen corresponding path program 114 times [2021-06-05 14:01:14,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:14,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235460121] [2021-06-05 14:01:14,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:14,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:14,262 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:14,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:14,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235460121] [2021-06-05 14:01:14,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235460121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:14,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640262129] [2021-06-05 14:01:14,263 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 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 14:01:14,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:01:14,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:14,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:01:14,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:14,584 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:14,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:14,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:14,941 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:14,942 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:14,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:15,084 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:15,088 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:01:15,091 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:15,108 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:15,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:15,109 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:01:15,138 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:15,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640262129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:15,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:15,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:01:15,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672230580] [2021-06-05 14:01:15,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:01:15,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:15,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:01:15,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:01:15,139 INFO L87 Difference]: Start difference. First operand 462 states and 1452 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:15,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:15,616 INFO L93 Difference]: Finished difference Result 516 states and 1564 transitions. [2021-06-05 14:01:15,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:01:15,616 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 18 [2021-06-05 14:01:15,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:15,617 INFO L225 Difference]: With dead ends: 516 [2021-06-05 14:01:15,617 INFO L226 Difference]: Without dead ends: 506 [2021-06-05 14:01:15,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 429.4ms TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:01:15,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-05 14:01:15,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 464. [2021-06-05 14:01:15,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.14902807775378) internal successors, (1458), 463 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:15,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1458 transitions. [2021-06-05 14:01:15,623 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1458 transitions. Word has length 18 [2021-06-05 14:01:15,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:15,623 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1458 transitions. [2021-06-05 14:01:15,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:15,623 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1458 transitions. [2021-06-05 14:01:15,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:01:15,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:15,624 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:15,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1956,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:15,825 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:15,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:15,825 INFO L82 PathProgramCache]: Analyzing trace with hash -430297721, now seen corresponding path program 115 times [2021-06-05 14:01:15,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:15,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028981184] [2021-06-05 14:01:15,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:15,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:15,920 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:15,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:15,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028981184] [2021-06-05 14:01:15,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028981184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:15,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638398329] [2021-06-05 14:01:15,921 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 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 14:01:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:15,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:01:15,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:16,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:16,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:16,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:16,982 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:16,982 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:16,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:17,099 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:17,101 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:01:17,102 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:17,118 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:17,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:17,119 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:01:17,149 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:17,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638398329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:17,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:17,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:01:17,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342205791] [2021-06-05 14:01:17,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:01:17,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:17,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:01:17,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:01:17,152 INFO L87 Difference]: Start difference. First operand 464 states and 1458 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:17,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:17,705 INFO L93 Difference]: Finished difference Result 532 states and 1598 transitions. [2021-06-05 14:01:17,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:01:17,706 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 18 [2021-06-05 14:01:17,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:17,707 INFO L225 Difference]: With dead ends: 532 [2021-06-05 14:01:17,707 INFO L226 Difference]: Without dead ends: 522 [2021-06-05 14:01:17,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 483.0ms TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:01:17,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-06-05 14:01:17,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 464. [2021-06-05 14:01:17,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.14902807775378) internal successors, (1458), 463 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:17,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1458 transitions. [2021-06-05 14:01:17,714 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1458 transitions. Word has length 18 [2021-06-05 14:01:17,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:17,714 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1458 transitions. [2021-06-05 14:01:17,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:17,714 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1458 transitions. [2021-06-05 14:01:17,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:01:17,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:17,716 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:17,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2051,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:17,940 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:17,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:17,941 INFO L82 PathProgramCache]: Analyzing trace with hash -486883791, now seen corresponding path program 116 times [2021-06-05 14:01:17,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:17,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481359343] [2021-06-05 14:01:17,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:18,048 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:01:18,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:18,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481359343] [2021-06-05 14:01:18,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481359343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:18,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886594532] [2021-06-05 14:01:18,050 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 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 14:01:18,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:01:18,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:18,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:01:18,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:18,361 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:18,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:18,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:18,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:18,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:01:18,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 14:01:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:18,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886594532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:18,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:18,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2021-06-05 14:01:18,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410733636] [2021-06-05 14:01:18,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:01:18,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:18,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:01:18,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:01:18,692 INFO L87 Difference]: Start difference. First operand 464 states and 1458 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 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 14:01:18,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:18,900 INFO L93 Difference]: Finished difference Result 485 states and 1487 transitions. [2021-06-05 14:01:18,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:01:18,901 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 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 18 [2021-06-05 14:01:18,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:18,903 INFO L225 Difference]: With dead ends: 485 [2021-06-05 14:01:18,903 INFO L226 Difference]: Without dead ends: 467 [2021-06-05 14:01:18,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 333.7ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:01:18,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-06-05 14:01:18,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 464. [2021-06-05 14:01:18,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.146868250539957) internal successors, (1457), 463 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:18,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1457 transitions. [2021-06-05 14:01:18,918 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1457 transitions. Word has length 18 [2021-06-05 14:01:18,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:18,918 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1457 transitions. [2021-06-05 14:01:18,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 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 14:01:18,918 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1457 transitions. [2021-06-05 14:01:18,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:01:18,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:18,919 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:19,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2163,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:19,144 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:19,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:19,144 INFO L82 PathProgramCache]: Analyzing trace with hash -100682677, now seen corresponding path program 117 times [2021-06-05 14:01:19,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:19,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671439337] [2021-06-05 14:01:19,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:19,273 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:01:19,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:19,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671439337] [2021-06-05 14:01:19,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671439337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:19,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73075394] [2021-06-05 14:01:19,273 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 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 14:01:19,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:01:19,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:19,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:01:19,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:19,654 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:19,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:19,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:20,034 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:20,034 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:20,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:20,541 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:20,543 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:01:20,544 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:20,565 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:20,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:20,566 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:01:20,595 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:20,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73075394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:20,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:20,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 14:01:20,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209697063] [2021-06-05 14:01:20,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:01:20,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:20,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:01:20,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:01:20,596 INFO L87 Difference]: Start difference. First operand 464 states and 1457 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 14:01:21,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:21,043 INFO L93 Difference]: Finished difference Result 544 states and 1603 transitions. [2021-06-05 14:01:21,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:01:21,044 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 18 [2021-06-05 14:01:21,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:21,065 INFO L225 Difference]: With dead ends: 544 [2021-06-05 14:01:21,065 INFO L226 Difference]: Without dead ends: 534 [2021-06-05 14:01:21,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 426.4ms TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:01:21,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-05 14:01:21,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 464. [2021-06-05 14:01:21,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.146868250539957) internal successors, (1457), 463 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:21,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1457 transitions. [2021-06-05 14:01:21,088 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1457 transitions. Word has length 18 [2021-06-05 14:01:21,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:21,089 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1457 transitions. [2021-06-05 14:01:21,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 14:01:21,089 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1457 transitions. [2021-06-05 14:01:21,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:01:21,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:21,090 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:21,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2246 [2021-06-05 14:01:21,309 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:21,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:21,309 INFO L82 PathProgramCache]: Analyzing trace with hash 437172901, now seen corresponding path program 118 times [2021-06-05 14:01:21,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:21,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479920711] [2021-06-05 14:01:21,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:21,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:21,406 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:21,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:21,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479920711] [2021-06-05 14:01:21,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479920711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:21,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6298253] [2021-06-05 14:01:21,413 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 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 14:01:21,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:01:21,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:21,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:01:21,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:21,736 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:21,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:21,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:22,088 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:22,088 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:22,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:22,297 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:22,299 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:01:22,300 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:22,315 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:22,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:22,316 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:01:22,345 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:22,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6298253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:22,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:22,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:01:22,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133310476] [2021-06-05 14:01:22,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:01:22,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:22,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:01:22,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:01:22,347 INFO L87 Difference]: Start difference. First operand 464 states and 1457 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:23,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:23,073 INFO L93 Difference]: Finished difference Result 595 states and 1709 transitions. [2021-06-05 14:01:23,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:01:23,074 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 18 [2021-06-05 14:01:23,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:23,075 INFO L225 Difference]: With dead ends: 595 [2021-06-05 14:01:23,075 INFO L226 Difference]: Without dead ends: 566 [2021-06-05 14:01:23,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 529.7ms TimeCoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:01:23,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-05 14:01:23,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 455. [2021-06-05 14:01:23,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 3.13215859030837) internal successors, (1422), 454 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:23,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1422 transitions. [2021-06-05 14:01:23,084 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1422 transitions. Word has length 18 [2021-06-05 14:01:23,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:23,084 INFO L482 AbstractCegarLoop]: Abstraction has 455 states and 1422 transitions. [2021-06-05 14:01:23,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:23,084 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1422 transitions. [2021-06-05 14:01:23,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:01:23,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:23,085 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:23,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2404,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:23,301 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:23,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:23,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1052837217, now seen corresponding path program 119 times [2021-06-05 14:01:23,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:23,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931539044] [2021-06-05 14:01:23,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:23,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:23,452 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:23,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:23,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931539044] [2021-06-05 14:01:23,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931539044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:23,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316041626] [2021-06-05 14:01:23,453 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 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 14:01:23,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:01:23,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:23,536 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 14:01:23,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:23,921 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:01:23,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:23,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 35 treesize of output 252 [2021-06-05 14:01:24,343 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 181 [2021-06-05 14:01:25,242 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 223 [2021-06-05 14:01:25,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:01:26,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:26,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:26,235 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:26,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:26,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-06-05 14:01:27,728 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 14:01:27,749 INFO L628 ElimStorePlain]: treesize reduction 40, result has 27.3 percent of original size [2021-06-05 14:01:27,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:27,750 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:124, output treesize:15 [2021-06-05 14:01:27,777 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:27,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316041626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:27,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:27,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:01:27,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59266090] [2021-06-05 14:01:27,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:01:27,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:27,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:01:27,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:01:27,778 INFO L87 Difference]: Start difference. First operand 455 states and 1422 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:28,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:28,130 INFO L93 Difference]: Finished difference Result 521 states and 1560 transitions. [2021-06-05 14:01:28,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:01:28,130 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 18 [2021-06-05 14:01:28,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:28,131 INFO L225 Difference]: With dead ends: 521 [2021-06-05 14:01:28,131 INFO L226 Difference]: Without dead ends: 511 [2021-06-05 14:01:28,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 477.9ms TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:01:28,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-06-05 14:01:28,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 456. [2021-06-05 14:01:28,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.131868131868132) internal successors, (1425), 455 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:28,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1425 transitions. [2021-06-05 14:01:28,136 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1425 transitions. Word has length 18 [2021-06-05 14:01:28,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:28,136 INFO L482 AbstractCegarLoop]: Abstraction has 456 states and 1425 transitions. [2021-06-05 14:01:28,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:28,136 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1425 transitions. [2021-06-05 14:01:28,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:01:28,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:28,136 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:28,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2515 [2021-06-05 14:01:28,337 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:28,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:28,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1663900857, now seen corresponding path program 120 times [2021-06-05 14:01:28,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:28,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727825099] [2021-06-05 14:01:28,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:28,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:28,424 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:28,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:28,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727825099] [2021-06-05 14:01:28,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727825099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:28,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126357439] [2021-06-05 14:01:28,425 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 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 14:01:28,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:01:28,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:28,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:01:28,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:28,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:28,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:28,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:28,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:28,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:01:28,888 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 14:01:28,892 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:28,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126357439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:28,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:28,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:01:28,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27003092] [2021-06-05 14:01:28,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:01:28,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:28,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:01:28,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:01:28,894 INFO L87 Difference]: Start difference. First operand 456 states and 1425 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:29,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:29,274 INFO L93 Difference]: Finished difference Result 558 states and 1698 transitions. [2021-06-05 14:01:29,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:01:29,275 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 18 [2021-06-05 14:01:29,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:29,276 INFO L225 Difference]: With dead ends: 558 [2021-06-05 14:01:29,276 INFO L226 Difference]: Without dead ends: 540 [2021-06-05 14:01:29,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 290.6ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:01:29,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-05 14:01:29,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 500. [2021-06-05 14:01:29,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 3.158316633266533) internal successors, (1576), 499 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:29,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1576 transitions. [2021-06-05 14:01:29,281 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1576 transitions. Word has length 18 [2021-06-05 14:01:29,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:29,281 INFO L482 AbstractCegarLoop]: Abstraction has 500 states and 1576 transitions. [2021-06-05 14:01:29,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:29,281 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1576 transitions. [2021-06-05 14:01:29,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:01:29,282 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:29,282 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:29,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3014,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:29,483 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:29,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:29,483 INFO L82 PathProgramCache]: Analyzing trace with hash -920317497, now seen corresponding path program 121 times [2021-06-05 14:01:29,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:29,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395250912] [2021-06-05 14:01:29,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:29,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:29,569 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:01:29,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:29,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395250912] [2021-06-05 14:01:29,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395250912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:29,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604235990] [2021-06-05 14:01:29,569 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 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 14:01:29,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:29,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:01:29,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:29,844 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:29,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:30,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:30,151 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:30,151 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:30,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:30,252 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:30,255 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:01:30,258 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:30,273 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:30,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:30,273 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:01:30,301 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:30,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604235990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:30,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:30,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:01:30,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859766074] [2021-06-05 14:01:30,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:01:30,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:30,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:01:30,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:01:30,302 INFO L87 Difference]: Start difference. First operand 500 states and 1576 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:30,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:30,969 INFO L93 Difference]: Finished difference Result 647 states and 1895 transitions. [2021-06-05 14:01:30,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:01:30,969 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 18 [2021-06-05 14:01:30,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:30,970 INFO L225 Difference]: With dead ends: 647 [2021-06-05 14:01:30,970 INFO L226 Difference]: Without dead ends: 621 [2021-06-05 14:01:30,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 454.3ms TimeCoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:01:30,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-06-05 14:01:30,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 506. [2021-06-05 14:01:30,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 3.1623762376237625) internal successors, (1597), 505 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:30,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1597 transitions. [2021-06-05 14:01:30,978 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1597 transitions. Word has length 18 [2021-06-05 14:01:30,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:30,978 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1597 transitions. [2021-06-05 14:01:30,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:30,978 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1597 transitions. [2021-06-05 14:01:30,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:01:30,979 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:30,979 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:31,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3060 [2021-06-05 14:01:31,193 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:31,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:31,193 INFO L82 PathProgramCache]: Analyzing trace with hash -69173365, now seen corresponding path program 122 times [2021-06-05 14:01:31,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:31,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918407339] [2021-06-05 14:01:31,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:31,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:31,298 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:31,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:31,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918407339] [2021-06-05 14:01:31,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918407339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:31,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116175568] [2021-06-05 14:01:31,299 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 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 14:01:31,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:01:31,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:31,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:01:31,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:31,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:31,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:31,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:31,925 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:31,932 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:31,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:32,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:32,265 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:01:32,266 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:32,280 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:32,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:32,281 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:01:32,306 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:32,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116175568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:32,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:32,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:01:32,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385322600] [2021-06-05 14:01:32,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:01:32,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:32,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:01:32,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:01:32,307 INFO L87 Difference]: Start difference. First operand 506 states and 1597 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:01:33,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:33,060 INFO L93 Difference]: Finished difference Result 727 states and 2070 transitions. [2021-06-05 14:01:33,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 14:01:33,061 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-05 14:01:33,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:33,062 INFO L225 Difference]: With dead ends: 727 [2021-06-05 14:01:33,062 INFO L226 Difference]: Without dead ends: 685 [2021-06-05 14:01:33,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 643.2ms TimeCoverageRelationStatistics Valid=234, Invalid=1406, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 14:01:33,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-06-05 14:01:33,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 507. [2021-06-05 14:01:33,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.144268774703557) internal successors, (1591), 506 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:33,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1591 transitions. [2021-06-05 14:01:33,068 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1591 transitions. Word has length 18 [2021-06-05 14:01:33,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:33,068 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1591 transitions. [2021-06-05 14:01:33,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:01:33,068 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1591 transitions. [2021-06-05 14:01:33,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:01:33,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:33,069 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:33,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3155 [2021-06-05 14:01:33,269 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:33,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:33,269 INFO L82 PathProgramCache]: Analyzing trace with hash 546490951, now seen corresponding path program 123 times [2021-06-05 14:01:33,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:33,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225701284] [2021-06-05 14:01:33,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:33,358 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:33,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:33,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225701284] [2021-06-05 14:01:33,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225701284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:33,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303715363] [2021-06-05 14:01:33,358 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 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 14:01:33,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:01:33,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:33,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:01:33,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:33,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:33,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:33,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:33,899 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:33,899 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:33,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:34,349 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:34,351 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:01:34,351 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:34,366 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:34,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:34,366 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:01:34,392 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:34,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303715363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:34,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:34,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:01:34,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361431387] [2021-06-05 14:01:34,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:01:34,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:34,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:01:34,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:01:34,393 INFO L87 Difference]: Start difference. First operand 507 states and 1591 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:01:34,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:34,840 INFO L93 Difference]: Finished difference Result 598 states and 1790 transitions. [2021-06-05 14:01:34,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:01:34,840 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-05 14:01:34,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:34,841 INFO L225 Difference]: With dead ends: 598 [2021-06-05 14:01:34,841 INFO L226 Difference]: Without dead ends: 588 [2021-06-05 14:01:34,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 457.2ms TimeCoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:01:34,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-06-05 14:01:34,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 507. [2021-06-05 14:01:34,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.144268774703557) internal successors, (1591), 506 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:34,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1591 transitions. [2021-06-05 14:01:34,847 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1591 transitions. Word has length 18 [2021-06-05 14:01:34,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:34,847 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1591 transitions. [2021-06-05 14:01:34,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:01:34,847 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1591 transitions. [2021-06-05 14:01:34,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:01:34,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:34,847 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:35,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3276 [2021-06-05 14:01:35,048 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:35,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:35,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1842751733, now seen corresponding path program 124 times [2021-06-05 14:01:35,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:35,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473683238] [2021-06-05 14:01:35,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:35,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:35,146 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:35,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:35,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473683238] [2021-06-05 14:01:35,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473683238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:35,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197849136] [2021-06-05 14:01:35,147 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 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 14:01:35,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:01:35,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:35,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:01:35,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:35,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:35,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:35,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:35,793 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:35,794 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:35,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:36,260 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:36,262 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:01:36,262 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:36,277 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:36,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:36,278 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:01:36,304 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:36,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197849136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:36,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:36,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:01:36,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070932755] [2021-06-05 14:01:36,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:01:36,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:36,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:01:36,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:01:36,305 INFO L87 Difference]: Start difference. First operand 507 states and 1591 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:01:36,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:36,792 INFO L93 Difference]: Finished difference Result 608 states and 1810 transitions. [2021-06-05 14:01:36,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:01:36,792 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-05 14:01:36,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:36,793 INFO L225 Difference]: With dead ends: 608 [2021-06-05 14:01:36,793 INFO L226 Difference]: Without dead ends: 598 [2021-06-05 14:01:36,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 531.7ms TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:01:36,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-06-05 14:01:36,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 507. [2021-06-05 14:01:36,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.144268774703557) internal successors, (1591), 506 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:36,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1591 transitions. [2021-06-05 14:01:36,801 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1591 transitions. Word has length 18 [2021-06-05 14:01:36,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:36,801 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1591 transitions. [2021-06-05 14:01:36,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:01:36,802 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1591 transitions. [2021-06-05 14:01:36,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:01:36,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:36,802 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:37,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3427 [2021-06-05 14:01:37,017 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:37,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:37,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1754340969, now seen corresponding path program 125 times [2021-06-05 14:01:37,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:37,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158553756] [2021-06-05 14:01:37,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:37,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:37,108 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:01:37,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:37,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158553756] [2021-06-05 14:01:37,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158553756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:37,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15672561] [2021-06-05 14:01:37,108 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 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 14:01:37,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:01:37,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:37,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:01:37,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:37,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:37,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:37,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:37,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:37,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:01:37,629 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 14:01:37,633 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:37,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15672561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:37,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:37,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 14:01:37,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781117997] [2021-06-05 14:01:37,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:01:37,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:37,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:01:37,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:01:37,634 INFO L87 Difference]: Start difference. First operand 507 states and 1591 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 14:01:37,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:37,919 INFO L93 Difference]: Finished difference Result 537 states and 1638 transitions. [2021-06-05 14:01:37,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:01:37,920 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 18 [2021-06-05 14:01:37,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:37,921 INFO L225 Difference]: With dead ends: 537 [2021-06-05 14:01:37,921 INFO L226 Difference]: Without dead ends: 519 [2021-06-05 14:01:37,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 321.3ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:01:37,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-05 14:01:37,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 507. [2021-06-05 14:01:37,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.142292490118577) internal successors, (1590), 506 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:37,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1590 transitions. [2021-06-05 14:01:37,929 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1590 transitions. Word has length 18 [2021-06-05 14:01:37,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:37,929 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1590 transitions. [2021-06-05 14:01:37,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 14:01:37,929 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1590 transitions. [2021-06-05 14:01:37,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:01:37,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:37,942 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:38,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3590 [2021-06-05 14:01:38,161 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:38,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:38,161 INFO L82 PathProgramCache]: Analyzing trace with hash -214619961, now seen corresponding path program 126 times [2021-06-05 14:01:38,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:38,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033586765] [2021-06-05 14:01:38,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:38,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:38,258 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:38,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:38,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033586765] [2021-06-05 14:01:38,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033586765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:38,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317071103] [2021-06-05 14:01:38,259 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 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 14:01:38,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:01:38,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:38,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:01:38,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:38,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:38,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:38,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:38,898 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:38,898 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:38,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:39,016 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:39,024 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:01:39,024 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:39,041 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:39,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:39,041 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:01:39,069 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:39,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317071103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:39,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:39,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:01:39,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001719193] [2021-06-05 14:01:39,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:01:39,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:39,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:01:39,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:01:39,070 INFO L87 Difference]: Start difference. First operand 507 states and 1590 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:39,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:39,590 INFO L93 Difference]: Finished difference Result 618 states and 1823 transitions. [2021-06-05 14:01:39,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:01:39,590 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 18 [2021-06-05 14:01:39,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:39,591 INFO L225 Difference]: With dead ends: 618 [2021-06-05 14:01:39,591 INFO L226 Difference]: Without dead ends: 608 [2021-06-05 14:01:39,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 506.1ms TimeCoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:01:39,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-06-05 14:01:39,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 507. [2021-06-05 14:01:39,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.142292490118577) internal successors, (1590), 506 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:39,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1590 transitions. [2021-06-05 14:01:39,599 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1590 transitions. Word has length 18 [2021-06-05 14:01:39,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:39,599 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1590 transitions. [2021-06-05 14:01:39,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:39,600 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1590 transitions. [2021-06-05 14:01:39,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:01:39,600 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:39,600 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:39,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3650 [2021-06-05 14:01:39,801 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:39,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:39,801 INFO L82 PathProgramCache]: Analyzing trace with hash -720966227, now seen corresponding path program 127 times [2021-06-05 14:01:39,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:39,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891870058] [2021-06-05 14:01:39,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:39,951 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:39,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:39,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891870058] [2021-06-05 14:01:39,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891870058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:39,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199705294] [2021-06-05 14:01:39,951 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 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 14:01:39,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:39,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:01:39,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:40,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:40,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:40,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:40,606 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:40,606 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:40,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:41,107 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:41,109 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:01:41,109 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:41,124 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:41,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:41,124 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:01:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:41,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199705294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:41,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:41,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:01:41,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714649436] [2021-06-05 14:01:41,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:01:41,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:41,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:01:41,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:01:41,150 INFO L87 Difference]: Start difference. First operand 507 states and 1590 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:01:41,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:41,858 INFO L93 Difference]: Finished difference Result 681 states and 1975 transitions. [2021-06-05 14:01:41,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:01:41,859 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-05 14:01:41,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:41,860 INFO L225 Difference]: With dead ends: 681 [2021-06-05 14:01:41,860 INFO L226 Difference]: Without dead ends: 652 [2021-06-05 14:01:41,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 623.3ms TimeCoverageRelationStatistics Valid=228, Invalid=1412, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 14:01:41,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-06-05 14:01:41,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 497. [2021-06-05 14:01:41,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 3.1330645161290325) internal successors, (1554), 496 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:41,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1554 transitions. [2021-06-05 14:01:41,865 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1554 transitions. Word has length 18 [2021-06-05 14:01:41,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:41,865 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1554 transitions. [2021-06-05 14:01:41,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:01:41,866 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1554 transitions. [2021-06-05 14:01:41,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:01:41,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:41,866 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:42,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3742,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:42,067 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:42,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:42,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1184758385, now seen corresponding path program 128 times [2021-06-05 14:01:42,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:42,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512309445] [2021-06-05 14:01:42,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:42,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:42,173 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:42,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:42,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512309445] [2021-06-05 14:01:42,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512309445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:42,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619100187] [2021-06-05 14:01:42,174 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 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 14:01:42,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:01:42,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:42,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:01:42,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:42,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:42,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:42,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:42,725 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:42,726 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:42,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:42,888 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:42,890 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:01:42,891 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:42,905 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:42,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:42,906 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:01:42,931 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:42,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619100187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:42,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:42,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:01:42,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441234497] [2021-06-05 14:01:42,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:01:42,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:42,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:01:42,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:01:42,932 INFO L87 Difference]: Start difference. First operand 497 states and 1554 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:01:43,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:43,408 INFO L93 Difference]: Finished difference Result 595 states and 1767 transitions. [2021-06-05 14:01:43,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:01:43,409 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-05 14:01:43,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:43,409 INFO L225 Difference]: With dead ends: 595 [2021-06-05 14:01:43,409 INFO L226 Difference]: Without dead ends: 585 [2021-06-05 14:01:43,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 524.4ms TimeCoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:01:43,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-05 14:01:43,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 498. [2021-06-05 14:01:43,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 3.132796780684105) internal successors, (1557), 497 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:43,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1557 transitions. [2021-06-05 14:01:43,415 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1557 transitions. Word has length 18 [2021-06-05 14:01:43,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:43,415 INFO L482 AbstractCegarLoop]: Abstraction has 498 states and 1557 transitions. [2021-06-05 14:01:43,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:01:43,415 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1557 transitions. [2021-06-05 14:01:43,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:01:43,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:43,416 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:43,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3931,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:43,617 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:43,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:43,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1448223097, now seen corresponding path program 129 times [2021-06-05 14:01:43,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:43,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532358301] [2021-06-05 14:01:43,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:43,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:43,711 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:43,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:43,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532358301] [2021-06-05 14:01:43,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532358301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:43,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137036035] [2021-06-05 14:01:43,712 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 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 14:01:43,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:01:43,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:43,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:01:43,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:44,062 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:44,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:44,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:44,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:44,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:01:44,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 14:01:44,390 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:44,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137036035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:44,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:44,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:01:44,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548225129] [2021-06-05 14:01:44,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:01:44,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:44,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:01:44,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:01:44,391 INFO L87 Difference]: Start difference. First operand 498 states and 1557 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:44,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:44,726 INFO L93 Difference]: Finished difference Result 613 states and 1879 transitions. [2021-06-05 14:01:44,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:01:44,726 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 18 [2021-06-05 14:01:44,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:44,727 INFO L225 Difference]: With dead ends: 613 [2021-06-05 14:01:44,727 INFO L226 Difference]: Without dead ends: 597 [2021-06-05 14:01:44,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 345.8ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:01:44,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-06-05 14:01:44,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 570. [2021-06-05 14:01:44,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 3.154657293497364) internal successors, (1795), 569 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:44,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 1795 transitions. [2021-06-05 14:01:44,736 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 1795 transitions. Word has length 18 [2021-06-05 14:01:44,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:44,736 INFO L482 AbstractCegarLoop]: Abstraction has 570 states and 1795 transitions. [2021-06-05 14:01:44,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:44,736 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 1795 transitions. [2021-06-05 14:01:44,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:01:44,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:44,737 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:44,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4029 [2021-06-05 14:01:44,961 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:44,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:44,961 INFO L82 PathProgramCache]: Analyzing trace with hash -704639737, now seen corresponding path program 130 times [2021-06-05 14:01:44,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:44,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222549553] [2021-06-05 14:01:44,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:44,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:45,077 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:45,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:45,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222549553] [2021-06-05 14:01:45,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222549553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:45,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140583935] [2021-06-05 14:01:45,078 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 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 14:01:45,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:01:45,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:45,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:01:45,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:45,397 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:45,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:45,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:45,850 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:45,850 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:45,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:46,336 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:46,339 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:01:46,340 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:46,358 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:46,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:46,359 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:01:46,398 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:46,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140583935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:46,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:46,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:01:46,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898297782] [2021-06-05 14:01:46,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:01:46,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:46,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:01:46,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:01:46,399 INFO L87 Difference]: Start difference. First operand 570 states and 1795 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:47,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:47,347 INFO L93 Difference]: Finished difference Result 700 states and 2080 transitions. [2021-06-05 14:01:47,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 14:01:47,348 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 18 [2021-06-05 14:01:47,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:47,349 INFO L225 Difference]: With dead ends: 700 [2021-06-05 14:01:47,349 INFO L226 Difference]: Without dead ends: 676 [2021-06-05 14:01:47,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 677.8ms TimeCoverageRelationStatistics Valid=218, Invalid=1504, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:01:47,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-06-05 14:01:47,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 573. [2021-06-05 14:01:47,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 3.1573426573426575) internal successors, (1806), 572 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:47,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1806 transitions. [2021-06-05 14:01:47,357 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1806 transitions. Word has length 18 [2021-06-05 14:01:47,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:47,357 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1806 transitions. [2021-06-05 14:01:47,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:47,358 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1806 transitions. [2021-06-05 14:01:47,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:01:47,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:47,358 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:47,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4105,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:47,582 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:47,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:47,582 INFO L82 PathProgramCache]: Analyzing trace with hash 146504395, now seen corresponding path program 131 times [2021-06-05 14:01:47,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:47,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613524464] [2021-06-05 14:01:47,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:47,681 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:01:47,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:47,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613524464] [2021-06-05 14:01:47,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613524464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:47,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555244263] [2021-06-05 14:01:47,682 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 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 14:01:47,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:01:47,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:47,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:01:47,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:48,012 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:48,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:48,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:48,377 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:48,378 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:48,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:48,709 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:48,712 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:01:48,712 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:48,729 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:48,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:48,729 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:01:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:48,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555244263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:48,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:48,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:01:48,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347971639] [2021-06-05 14:01:48,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:01:48,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:48,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:01:48,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:01:48,760 INFO L87 Difference]: Start difference. First operand 573 states and 1806 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:49,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:49,439 INFO L93 Difference]: Finished difference Result 692 states and 2071 transitions. [2021-06-05 14:01:49,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:01:49,440 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 18 [2021-06-05 14:01:49,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:49,441 INFO L225 Difference]: With dead ends: 692 [2021-06-05 14:01:49,441 INFO L226 Difference]: Without dead ends: 682 [2021-06-05 14:01:49,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 543.2ms TimeCoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:01:49,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-06-05 14:01:49,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 591. [2021-06-05 14:01:49,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.1627118644067798) internal successors, (1866), 590 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:49,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1866 transitions. [2021-06-05 14:01:49,449 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1866 transitions. Word has length 18 [2021-06-05 14:01:49,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:49,450 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 1866 transitions. [2021-06-05 14:01:49,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:49,450 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1866 transitions. [2021-06-05 14:01:49,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:01:49,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:49,451 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:49,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4249,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:49,673 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:49,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:49,674 INFO L82 PathProgramCache]: Analyzing trace with hash 762168711, now seen corresponding path program 132 times [2021-06-05 14:01:49,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:49,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477053832] [2021-06-05 14:01:49,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:49,783 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:49,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:49,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477053832] [2021-06-05 14:01:49,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477053832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:49,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156126074] [2021-06-05 14:01:49,784 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 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 14:01:49,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:01:49,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:49,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:01:49,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:50,112 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:50,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:50,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:50,649 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:50,650 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:50,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:50,783 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:50,785 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:01:50,786 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:50,801 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:50,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:50,801 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:01:50,828 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:50,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156126074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:50,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:50,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:01:50,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027384556] [2021-06-05 14:01:50,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:01:50,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:50,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:01:50,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:01:50,829 INFO L87 Difference]: Start difference. First operand 591 states and 1866 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:01:51,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:51,580 INFO L93 Difference]: Finished difference Result 752 states and 2200 transitions. [2021-06-05 14:01:51,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:01:51,581 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-05 14:01:51,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:51,583 INFO L225 Difference]: With dead ends: 752 [2021-06-05 14:01:51,583 INFO L226 Difference]: Without dead ends: 730 [2021-06-05 14:01:51,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 686.9ms TimeCoverageRelationStatistics Valid=233, Invalid=1659, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 14:01:51,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-06-05 14:01:51,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 593. [2021-06-05 14:01:51,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.1554054054054053) internal successors, (1868), 592 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:51,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1868 transitions. [2021-06-05 14:01:51,591 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1868 transitions. Word has length 18 [2021-06-05 14:01:51,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:51,591 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1868 transitions. [2021-06-05 14:01:51,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:01:51,592 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1868 transitions. [2021-06-05 14:01:51,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:01:51,592 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:51,592 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:51,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4371,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:51,811 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:51,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:51,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1627073973, now seen corresponding path program 133 times [2021-06-05 14:01:51,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:51,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477152546] [2021-06-05 14:01:51,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:51,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:51,937 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:51,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:51,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477152546] [2021-06-05 14:01:51,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477152546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:51,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255453302] [2021-06-05 14:01:51,937 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 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 14:01:51,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:51,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:01:51,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:52,300 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:52,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:52,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:53,177 INFO L244 Elim1Store]: Index analysis took 364 ms [2021-06-05 14:01:53,377 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:53,377 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:53,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:53,609 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:53,612 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:01:53,612 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:53,629 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:53,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:53,630 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:01:53,660 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:53,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255453302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:53,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:53,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:01:53,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419196282] [2021-06-05 14:01:53,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:01:53,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:53,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:01:53,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:01:53,662 INFO L87 Difference]: Start difference. First operand 593 states and 1868 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:01:54,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:54,283 INFO L93 Difference]: Finished difference Result 683 states and 2069 transitions. [2021-06-05 14:01:54,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:01:54,283 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-05 14:01:54,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:54,285 INFO L225 Difference]: With dead ends: 683 [2021-06-05 14:01:54,285 INFO L226 Difference]: Without dead ends: 678 [2021-06-05 14:01:54,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 674.3ms TimeCoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:01:54,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-06-05 14:01:54,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 593. [2021-06-05 14:01:54,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.1554054054054053) internal successors, (1868), 592 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:54,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1868 transitions. [2021-06-05 14:01:54,293 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1868 transitions. Word has length 18 [2021-06-05 14:01:54,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:54,293 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1868 transitions. [2021-06-05 14:01:54,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:01:54,293 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1868 transitions. [2021-06-05 14:01:54,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:01:54,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:54,294 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:54,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4478,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:54,516 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:54,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:54,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1615814151, now seen corresponding path program 134 times [2021-06-05 14:01:54,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:54,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240574094] [2021-06-05 14:01:54,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:54,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:54,625 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:54,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:54,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240574094] [2021-06-05 14:01:54,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240574094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:54,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179168544] [2021-06-05 14:01:54,625 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 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 14:01:54,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:01:54,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:54,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:01:54,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:54,949 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-06-05 14:01:55,239 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:55,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:55,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:55,594 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:55,595 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:55,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:55,717 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:55,720 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:01:55,720 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:55,737 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:55,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:55,738 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:01:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:55,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179168544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:55,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:55,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:01:55,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103025836] [2021-06-05 14:01:55,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:01:55,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:55,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:01:55,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:01:55,780 INFO L87 Difference]: Start difference. First operand 593 states and 1868 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:01:56,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:56,328 INFO L93 Difference]: Finished difference Result 681 states and 2066 transitions. [2021-06-05 14:01:56,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:01:56,329 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-05 14:01:56,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:56,330 INFO L225 Difference]: With dead ends: 681 [2021-06-05 14:01:56,330 INFO L226 Difference]: Without dead ends: 676 [2021-06-05 14:01:56,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 851.6ms TimeCoverageRelationStatistics Valid=162, Invalid=1028, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:01:56,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-06-05 14:01:56,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 593. [2021-06-05 14:01:56,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.1554054054054053) internal successors, (1868), 592 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:56,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1868 transitions. [2021-06-05 14:01:56,338 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1868 transitions. Word has length 18 [2021-06-05 14:01:56,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:56,338 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1868 transitions. [2021-06-05 14:01:56,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:01:56,339 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1868 transitions. [2021-06-05 14:01:56,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:01:56,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:56,339 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:56,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4596 [2021-06-05 14:01:56,564 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:56,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:56,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1904159473, now seen corresponding path program 135 times [2021-06-05 14:01:56,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:56,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976659286] [2021-06-05 14:01:56,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:56,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:56,691 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:56,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:56,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976659286] [2021-06-05 14:01:56,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976659286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:56,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317400907] [2021-06-05 14:01:56,692 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 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 14:01:56,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:01:56,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:56,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:01:56,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:56,989 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:56,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:57,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:57,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:57,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:01:57,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 14:01:57,519 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:57,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317400907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:57,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:57,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:01:57,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888468997] [2021-06-05 14:01:57,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:01:57,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:57,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:01:57,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:01:57,520 INFO L87 Difference]: Start difference. First operand 593 states and 1868 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:57,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:57,851 INFO L93 Difference]: Finished difference Result 630 states and 1927 transitions. [2021-06-05 14:01:57,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:01:57,852 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 18 [2021-06-05 14:01:57,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:57,853 INFO L225 Difference]: With dead ends: 630 [2021-06-05 14:01:57,853 INFO L226 Difference]: Without dead ends: 612 [2021-06-05 14:01:57,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 343.0ms TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:01:57,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-06-05 14:01:57,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 593. [2021-06-05 14:01:57,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.152027027027027) internal successors, (1866), 592 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:57,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1866 transitions. [2021-06-05 14:01:57,861 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1866 transitions. Word has length 18 [2021-06-05 14:01:57,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:57,861 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1866 transitions. [2021-06-05 14:01:57,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:01:57,861 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1866 transitions. [2021-06-05 14:01:57,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:01:57,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:57,862 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:58,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4692 [2021-06-05 14:01:58,075 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:58,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:58,075 INFO L82 PathProgramCache]: Analyzing trace with hash 548291531, now seen corresponding path program 136 times [2021-06-05 14:01:58,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:58,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727605340] [2021-06-05 14:01:58,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:58,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:58,176 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:58,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:58,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727605340] [2021-06-05 14:01:58,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727605340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:58,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357068836] [2021-06-05 14:01:58,176 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 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 14:01:58,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:01:58,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:58,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:01:58,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:58,579 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:58,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:01:58,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:59,014 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:01:59,015 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:01:59,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:01:59,202 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:01:59,204 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:01:59,205 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:59,219 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:01:59,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:01:59,220 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:01:59,246 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:59,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357068836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:59,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:59,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:01:59,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848221781] [2021-06-05 14:01:59,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:01:59,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:59,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:01:59,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:01:59,247 INFO L87 Difference]: Start difference. First operand 593 states and 1866 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:02:00,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:00,107 INFO L93 Difference]: Finished difference Result 747 states and 2217 transitions. [2021-06-05 14:02:00,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:02:00,108 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-05 14:02:00,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:00,109 INFO L225 Difference]: With dead ends: 747 [2021-06-05 14:02:00,109 INFO L226 Difference]: Without dead ends: 737 [2021-06-05 14:02:00,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 886.5ms TimeCoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:02:00,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-06-05 14:02:00,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 599. [2021-06-05 14:02:00,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 3.1538461538461537) internal successors, (1886), 598 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:00,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1886 transitions. [2021-06-05 14:02:00,120 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1886 transitions. Word has length 18 [2021-06-05 14:02:00,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:00,120 INFO L482 AbstractCegarLoop]: Abstraction has 599 states and 1886 transitions. [2021-06-05 14:02:00,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:02:00,120 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1886 transitions. [2021-06-05 14:02:00,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:02:00,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:00,121 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:00,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4740,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:00,345 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:00,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:00,345 INFO L82 PathProgramCache]: Analyzing trace with hash 2031426469, now seen corresponding path program 137 times [2021-06-05 14:02:00,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:00,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346315451] [2021-06-05 14:02:00,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:00,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:00,462 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:00,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:00,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346315451] [2021-06-05 14:02:00,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346315451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:00,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046463266] [2021-06-05 14:02:00,463 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 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 14:02:00,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:02:00,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:00,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:02:00,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:00,855 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:00,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:02:01,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:01,251 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:02:01,251 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:02:01,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:02:01,381 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:02:01,387 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:01,387 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:01,404 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:02:01,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:01,405 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:02:01,435 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:01,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046463266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:01,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:01,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:02:01,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914611512] [2021-06-05 14:02:01,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:02:01,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:01,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:02:01,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:02:01,436 INFO L87 Difference]: Start difference. First operand 599 states and 1886 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:02:02,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:02,349 INFO L93 Difference]: Finished difference Result 777 states and 2279 transitions. [2021-06-05 14:02:02,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:02:02,350 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-05 14:02:02,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:02,351 INFO L225 Difference]: With dead ends: 777 [2021-06-05 14:02:02,351 INFO L226 Difference]: Without dead ends: 748 [2021-06-05 14:02:02,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 928.5ms TimeCoverageRelationStatistics Valid=270, Invalid=1710, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 14:02:02,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-06-05 14:02:02,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 597. [2021-06-05 14:02:02,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 3.1493288590604025) internal successors, (1877), 596 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:02,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 1877 transitions. [2021-06-05 14:02:02,359 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 1877 transitions. Word has length 18 [2021-06-05 14:02:02,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:02,359 INFO L482 AbstractCegarLoop]: Abstraction has 597 states and 1877 transitions. [2021-06-05 14:02:02,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:02:02,359 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1877 transitions. [2021-06-05 14:02:02,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:02:02,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:02,360 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:02,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4888,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:02,578 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:02,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:02,578 INFO L82 PathProgramCache]: Analyzing trace with hash 979347297, now seen corresponding path program 138 times [2021-06-05 14:02:02,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:02,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766916533] [2021-06-05 14:02:02,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:02,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:02,681 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:02,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:02,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766916533] [2021-06-05 14:02:02,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766916533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:02,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872363442] [2021-06-05 14:02:02,681 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 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 14:02:02,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:02:02,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:02,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:02:02,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:03,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:03,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:02:03,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:03,331 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:02:03,331 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:02:03,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:02:03,639 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:02:03,642 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:03,642 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:03,658 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:02:03,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:03,659 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:02:03,689 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:03,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872363442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:03,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:03,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:02:03,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603935061] [2021-06-05 14:02:03,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:02:03,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:03,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:02:03,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:02:03,690 INFO L87 Difference]: Start difference. First operand 597 states and 1877 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:02:04,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:04,352 INFO L93 Difference]: Finished difference Result 676 states and 2054 transitions. [2021-06-05 14:02:04,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:02:04,352 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-05 14:02:04,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:04,353 INFO L225 Difference]: With dead ends: 676 [2021-06-05 14:02:04,354 INFO L226 Difference]: Without dead ends: 671 [2021-06-05 14:02:04,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 663.9ms TimeCoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:02:04,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-06-05 14:02:04,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 597. [2021-06-05 14:02:04,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 3.1493288590604025) internal successors, (1877), 596 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:04,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 1877 transitions. [2021-06-05 14:02:04,362 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 1877 transitions. Word has length 18 [2021-06-05 14:02:04,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:04,362 INFO L482 AbstractCegarLoop]: Abstraction has 597 states and 1877 transitions. [2021-06-05 14:02:04,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:02:04,362 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1877 transitions. [2021-06-05 14:02:04,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:02:04,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:04,363 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:04,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4998,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:04,580 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:04,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:04,580 INFO L82 PathProgramCache]: Analyzing trace with hash 942820167, now seen corresponding path program 139 times [2021-06-05 14:02:04,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:04,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434228676] [2021-06-05 14:02:04,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:04,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:04,685 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:04,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:04,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434228676] [2021-06-05 14:02:04,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434228676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:04,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501430390] [2021-06-05 14:02:04,685 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 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 14:02:04,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:04,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:02:04,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:05,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:05,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:02:05,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:05,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:05,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:05,206 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 14:02:05,210 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:05,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501430390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:05,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:05,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:02:05,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679808327] [2021-06-05 14:02:05,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:02:05,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:05,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:02:05,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:02:05,211 INFO L87 Difference]: Start difference. First operand 597 states and 1877 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:02:05,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:05,545 INFO L93 Difference]: Finished difference Result 707 states and 2181 transitions. [2021-06-05 14:02:05,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:02:05,546 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 18 [2021-06-05 14:02:05,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:05,547 INFO L225 Difference]: With dead ends: 707 [2021-06-05 14:02:05,547 INFO L226 Difference]: Without dead ends: 691 [2021-06-05 14:02:05,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 346.2ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:02:05,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-06-05 14:02:05,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 667. [2021-06-05 14:02:05,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 3.165165165165165) internal successors, (2108), 666 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:05,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 2108 transitions. [2021-06-05 14:02:05,556 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 2108 transitions. Word has length 18 [2021-06-05 14:02:05,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:05,556 INFO L482 AbstractCegarLoop]: Abstraction has 667 states and 2108 transitions. [2021-06-05 14:02:05,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:02:05,556 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 2108 transitions. [2021-06-05 14:02:05,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:02:05,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:05,557 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:05,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5114,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:05,778 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:05,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:05,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1686403527, now seen corresponding path program 140 times [2021-06-05 14:02:05,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:05,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977561255] [2021-06-05 14:02:05,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:05,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:05,919 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:05,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:05,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977561255] [2021-06-05 14:02:05,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977561255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:05,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489097649] [2021-06-05 14:02:05,920 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 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 14:02:05,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:02:05,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:05,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:02:05,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:06,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:06,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:02:06,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:06,706 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:02:06,706 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:02:06,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:02:06,956 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:02:06,958 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:06,959 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:06,976 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:02:06,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:06,976 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:02:07,009 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:07,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489097649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:07,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:07,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:02:07,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252977190] [2021-06-05 14:02:07,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:02:07,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:07,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:02:07,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:02:07,011 INFO L87 Difference]: Start difference. First operand 667 states and 2108 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:02:08,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:08,113 INFO L93 Difference]: Finished difference Result 772 states and 2340 transitions. [2021-06-05 14:02:08,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 14:02:08,114 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 18 [2021-06-05 14:02:08,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:08,115 INFO L225 Difference]: With dead ends: 772 [2021-06-05 14:02:08,115 INFO L226 Difference]: Without dead ends: 762 [2021-06-05 14:02:08,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 696.2ms TimeCoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:02:08,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-06-05 14:02:08,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 670. [2021-06-05 14:02:08,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 3.1689088191330343) internal successors, (2120), 669 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:08,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 2120 transitions. [2021-06-05 14:02:08,125 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 2120 transitions. Word has length 18 [2021-06-05 14:02:08,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:08,125 INFO L482 AbstractCegarLoop]: Abstraction has 670 states and 2120 transitions. [2021-06-05 14:02:08,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:02:08,125 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 2120 transitions. [2021-06-05 14:02:08,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:02:08,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:08,126 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:08,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5168 [2021-06-05 14:02:08,348 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:08,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:08,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1757419637, now seen corresponding path program 141 times [2021-06-05 14:02:08,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:08,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916409230] [2021-06-05 14:02:08,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:08,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:08,465 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:08,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:08,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916409230] [2021-06-05 14:02:08,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916409230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:08,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209772056] [2021-06-05 14:02:08,466 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 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 14:02:08,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:02:08,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:08,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:02:08,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:08,848 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:08,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:02:09,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:09,216 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:02:09,217 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:02:09,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:02:09,443 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:02:09,446 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:09,447 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:09,463 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:02:09,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:09,464 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:02:09,494 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:09,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209772056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:09,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:09,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:02:09,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962449486] [2021-06-05 14:02:09,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:02:09,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:09,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:02:09,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:02:09,495 INFO L87 Difference]: Start difference. First operand 670 states and 2120 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:02:10,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:10,315 INFO L93 Difference]: Finished difference Result 788 states and 2394 transitions. [2021-06-05 14:02:10,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:02:10,315 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 18 [2021-06-05 14:02:10,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:10,317 INFO L225 Difference]: With dead ends: 788 [2021-06-05 14:02:10,317 INFO L226 Difference]: Without dead ends: 778 [2021-06-05 14:02:10,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 574.4ms TimeCoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:02:10,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2021-06-05 14:02:10,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 695. [2021-06-05 14:02:10,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 3.1714697406340058) internal successors, (2201), 694 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:10,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 2201 transitions. [2021-06-05 14:02:10,327 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 2201 transitions. Word has length 18 [2021-06-05 14:02:10,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:10,327 INFO L482 AbstractCegarLoop]: Abstraction has 695 states and 2201 transitions. [2021-06-05 14:02:10,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:02:10,327 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 2201 transitions. [2021-06-05 14:02:10,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:02:10,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:10,328 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:10,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5316 [2021-06-05 14:02:10,537 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:10,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:10,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1141755321, now seen corresponding path program 142 times [2021-06-05 14:02:10,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:10,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223135489] [2021-06-05 14:02:10,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:10,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:10,677 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:02:10,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:10,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223135489] [2021-06-05 14:02:10,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223135489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:10,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773665492] [2021-06-05 14:02:10,678 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 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 14:02:10,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:02:10,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:10,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:02:10,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:11,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:11,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:02:11,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:11,378 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:02:11,378 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:02:11,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:02:11,522 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:02:11,526 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:11,532 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:11,550 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:02:11,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:11,551 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:02:11,582 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:11,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773665492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:11,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:11,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:02:11,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741715837] [2021-06-05 14:02:11,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:02:11,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:11,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:02:11,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:02:11,583 INFO L87 Difference]: Start difference. First operand 695 states and 2201 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:02:12,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:12,227 INFO L93 Difference]: Finished difference Result 836 states and 2495 transitions. [2021-06-05 14:02:12,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:02:12,227 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 18 [2021-06-05 14:02:12,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:12,229 INFO L225 Difference]: With dead ends: 836 [2021-06-05 14:02:12,229 INFO L226 Difference]: Without dead ends: 826 [2021-06-05 14:02:12,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 663.6ms TimeCoverageRelationStatistics Valid=178, Invalid=1228, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:02:12,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-06-05 14:02:12,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 705. [2021-06-05 14:02:12,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.171875) internal successors, (2233), 704 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:12,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2233 transitions. [2021-06-05 14:02:12,238 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2233 transitions. Word has length 18 [2021-06-05 14:02:12,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:12,238 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2233 transitions. [2021-06-05 14:02:12,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:02:12,239 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2233 transitions. [2021-06-05 14:02:12,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:02:12,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:12,239 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:12,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5417,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:12,445 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:12,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:12,445 INFO L82 PathProgramCache]: Analyzing trace with hash 763969291, now seen corresponding path program 143 times [2021-06-05 14:02:12,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:12,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257266520] [2021-06-05 14:02:12,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:12,596 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:12,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:12,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257266520] [2021-06-05 14:02:12,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257266520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:12,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391998443] [2021-06-05 14:02:12,596 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 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 14:02:12,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:02:12,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:12,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:02:12,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:12,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:12,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:02:12,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:13,142 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:02:13,142 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:02:13,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:02:13,553 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:02:13,556 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:13,556 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:13,573 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:02:13,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:13,574 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:02:13,604 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:13,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391998443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:13,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:13,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:02:13,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042448963] [2021-06-05 14:02:13,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:02:13,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:13,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:02:13,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:02:13,605 INFO L87 Difference]: Start difference. First operand 705 states and 2233 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:02:14,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:14,459 INFO L93 Difference]: Finished difference Result 890 states and 2620 transitions. [2021-06-05 14:02:14,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:02:14,459 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-05 14:02:14,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:14,460 INFO L225 Difference]: With dead ends: 890 [2021-06-05 14:02:14,460 INFO L226 Difference]: Without dead ends: 868 [2021-06-05 14:02:14,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 830.2ms TimeCoverageRelationStatistics Valid=286, Invalid=1876, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 14:02:14,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-06-05 14:02:14,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 705. [2021-06-05 14:02:14,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.1676136363636362) internal successors, (2230), 704 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:14,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2230 transitions. [2021-06-05 14:02:14,468 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2230 transitions. Word has length 18 [2021-06-05 14:02:14,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:14,468 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2230 transitions. [2021-06-05 14:02:14,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:02:14,468 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2230 transitions. [2021-06-05 14:02:14,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:02:14,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:14,469 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:14,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5511,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:14,670 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:14,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:14,670 INFO L82 PathProgramCache]: Analyzing trace with hash -288109881, now seen corresponding path program 144 times [2021-06-05 14:02:14,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:14,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390697544] [2021-06-05 14:02:14,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:14,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:14,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:14,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390697544] [2021-06-05 14:02:14,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390697544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:14,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921703072] [2021-06-05 14:02:14,777 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 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 14:02:14,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:02:14,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:14,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:02:14,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:15,129 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:15,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:02:15,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:15,711 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:02:15,712 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:02:15,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:02:15,851 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:02:15,854 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:15,854 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:15,871 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:02:15,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:15,872 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:02:15,902 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:15,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921703072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:15,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:15,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:02:15,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809723643] [2021-06-05 14:02:15,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:02:15,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:15,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:02:15,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:02:15,904 INFO L87 Difference]: Start difference. First operand 705 states and 2230 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:02:16,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:16,587 INFO L93 Difference]: Finished difference Result 803 states and 2447 transitions. [2021-06-05 14:02:16,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:02:16,587 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-05 14:02:16,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:16,588 INFO L225 Difference]: With dead ends: 803 [2021-06-05 14:02:16,588 INFO L226 Difference]: Without dead ends: 798 [2021-06-05 14:02:16,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 709.5ms TimeCoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:02:16,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-06-05 14:02:16,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 705. [2021-06-05 14:02:16,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.1676136363636362) internal successors, (2230), 704 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:16,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2230 transitions. [2021-06-05 14:02:16,598 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2230 transitions. Word has length 18 [2021-06-05 14:02:16,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:16,598 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2230 transitions. [2021-06-05 14:02:16,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:02:16,598 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2230 transitions. [2021-06-05 14:02:16,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:02:16,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:16,601 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:16,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5650 [2021-06-05 14:02:16,821 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:16,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:16,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1457174155, now seen corresponding path program 145 times [2021-06-05 14:02:16,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:16,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057935429] [2021-06-05 14:02:16,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:16,984 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:16,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:16,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057935429] [2021-06-05 14:02:16,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057935429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:16,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246843571] [2021-06-05 14:02:16,985 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 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 14:02:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:17,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:02:17,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:17,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:17,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:02:17,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:17,878 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:02:17,878 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:02:17,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:02:18,040 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:02:18,042 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:18,043 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:18,060 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:02:18,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:18,061 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:02:18,091 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:18,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246843571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:18,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:18,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:02:18,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204679700] [2021-06-05 14:02:18,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:02:18,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:18,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:02:18,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:02:18,092 INFO L87 Difference]: Start difference. First operand 705 states and 2230 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:02:18,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:18,803 INFO L93 Difference]: Finished difference Result 813 states and 2474 transitions. [2021-06-05 14:02:18,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:02:18,804 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-05 14:02:18,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:18,805 INFO L225 Difference]: With dead ends: 813 [2021-06-05 14:02:18,805 INFO L226 Difference]: Without dead ends: 808 [2021-06-05 14:02:18,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 754.8ms TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:02:18,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-06-05 14:02:18,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 705. [2021-06-05 14:02:18,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.1676136363636362) internal successors, (2230), 704 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:18,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2230 transitions. [2021-06-05 14:02:18,814 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2230 transitions. Word has length 18 [2021-06-05 14:02:18,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:18,814 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2230 transitions. [2021-06-05 14:02:18,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:02:18,814 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2230 transitions. [2021-06-05 14:02:18,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:02:18,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:18,815 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:19,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5778,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:19,016 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:19,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:19,016 INFO L82 PathProgramCache]: Analyzing trace with hash -646443817, now seen corresponding path program 146 times [2021-06-05 14:02:19,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:19,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624875498] [2021-06-05 14:02:19,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:19,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:19,132 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:19,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:19,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624875498] [2021-06-05 14:02:19,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624875498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:19,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938023571] [2021-06-05 14:02:19,133 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 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 14:02:19,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:02:19,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:19,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:02:19,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:19,503 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:19,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:02:19,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:19,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:19,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:19,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 14:02:19,727 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:19,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938023571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:19,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:19,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:02:19,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353355053] [2021-06-05 14:02:19,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:02:19,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:19,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:02:19,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:02:19,728 INFO L87 Difference]: Start difference. First operand 705 states and 2230 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:02:20,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:20,153 INFO L93 Difference]: Finished difference Result 751 states and 2311 transitions. [2021-06-05 14:02:20,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:02:20,154 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-05 14:02:20,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:20,155 INFO L225 Difference]: With dead ends: 751 [2021-06-05 14:02:20,155 INFO L226 Difference]: Without dead ends: 733 [2021-06-05 14:02:20,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 403.6ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:02:20,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-06-05 14:02:20,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 705. [2021-06-05 14:02:20,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.164772727272727) internal successors, (2228), 704 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:20,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2228 transitions. [2021-06-05 14:02:20,165 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2228 transitions. Word has length 18 [2021-06-05 14:02:20,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:20,165 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2228 transitions. [2021-06-05 14:02:20,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:02:20,165 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2228 transitions. [2021-06-05 14:02:20,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:02:20,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:20,166 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:20,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5939 [2021-06-05 14:02:20,390 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:20,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:20,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1571255993, now seen corresponding path program 147 times [2021-06-05 14:02:20,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:20,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274287603] [2021-06-05 14:02:20,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:20,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:20,510 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:20,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:20,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274287603] [2021-06-05 14:02:20,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274287603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:20,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530236380] [2021-06-05 14:02:20,511 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 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 14:02:20,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:02:20,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:20,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:02:20,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:20,857 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:20,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:02:20,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:21,167 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:02:21,168 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:02:21,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:02:21,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:02:21,704 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:21,705 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:21,721 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:02:21,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:21,722 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:02:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:21,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530236380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:21,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:21,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:02:21,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101804186] [2021-06-05 14:02:21,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:02:21,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:21,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:02:21,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:02:21,752 INFO L87 Difference]: Start difference. First operand 705 states and 2228 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:02:22,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:22,770 INFO L93 Difference]: Finished difference Result 846 states and 2546 transitions. [2021-06-05 14:02:22,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:02:22,770 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-05 14:02:22,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:22,771 INFO L225 Difference]: With dead ends: 846 [2021-06-05 14:02:22,771 INFO L226 Difference]: Without dead ends: 836 [2021-06-05 14:02:22,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 941.7ms TimeCoverageRelationStatistics Valid=272, Invalid=1708, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 14:02:22,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-06-05 14:02:22,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 705. [2021-06-05 14:02:22,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.164772727272727) internal successors, (2228), 704 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:22,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2228 transitions. [2021-06-05 14:02:22,781 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2228 transitions. Word has length 18 [2021-06-05 14:02:22,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:22,781 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2228 transitions. [2021-06-05 14:02:22,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:02:22,781 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2228 transitions. [2021-06-05 14:02:22,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:02:22,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:22,782 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:22,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5997,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:22,989 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:22,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:22,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1456254125, now seen corresponding path program 148 times [2021-06-05 14:02:22,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:22,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772029170] [2021-06-05 14:02:22,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:23,091 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:23,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:23,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772029170] [2021-06-05 14:02:23,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772029170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:23,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192401782] [2021-06-05 14:02:23,092 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 14:02:23,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:02:23,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:23,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:02:23,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:23,439 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:23,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:02:23,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:23,980 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:02:23,981 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:02:23,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:02:24,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:02:24,279 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:24,280 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:24,296 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:02:24,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:24,297 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:02:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:24,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192401782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:24,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:24,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:02:24,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338359921] [2021-06-05 14:02:24,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:02:24,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:24,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:02:24,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:02:24,328 INFO L87 Difference]: Start difference. First operand 705 states and 2228 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:02:25,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:25,350 INFO L93 Difference]: Finished difference Result 871 states and 2573 transitions. [2021-06-05 14:02:25,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:02:25,351 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-05 14:02:25,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:25,352 INFO L225 Difference]: With dead ends: 871 [2021-06-05 14:02:25,352 INFO L226 Difference]: Without dead ends: 856 [2021-06-05 14:02:25,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 988.4ms TimeCoverageRelationStatistics Valid=300, Invalid=1770, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 14:02:25,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-06-05 14:02:25,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 706. [2021-06-05 14:02:25,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 3.1659574468085108) internal successors, (2232), 705 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:25,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2232 transitions. [2021-06-05 14:02:25,361 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2232 transitions. Word has length 18 [2021-06-05 14:02:25,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:25,362 INFO L482 AbstractCegarLoop]: Abstraction has 706 states and 2232 transitions. [2021-06-05 14:02:25,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:02:25,362 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2232 transitions. [2021-06-05 14:02:25,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:02:25,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:25,363 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:25,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6137,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:25,577 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:25,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:25,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1093429135, now seen corresponding path program 149 times [2021-06-05 14:02:25,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:25,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96598389] [2021-06-05 14:02:25,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:25,680 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:25,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:25,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96598389] [2021-06-05 14:02:25,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96598389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:25,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240643329] [2021-06-05 14:02:25,681 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 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 14:02:25,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:02:25,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:25,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:02:25,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:26,029 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:26,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:02:26,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:26,320 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:02:26,321 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:02:26,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:02:26,585 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:02:26,587 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:26,588 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:26,605 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:02:26,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:26,606 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:02:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:26,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240643329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:26,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:26,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:02:26,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102268536] [2021-06-05 14:02:26,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:02:26,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:26,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:02:26,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:02:26,637 INFO L87 Difference]: Start difference. First operand 706 states and 2232 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:02:27,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:27,553 INFO L93 Difference]: Finished difference Result 805 states and 2457 transitions. [2021-06-05 14:02:27,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:02:27,554 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-05 14:02:27,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:27,555 INFO L225 Difference]: With dead ends: 805 [2021-06-05 14:02:27,555 INFO L226 Difference]: Without dead ends: 800 [2021-06-05 14:02:27,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 899.0ms TimeCoverageRelationStatistics Valid=220, Invalid=1262, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 14:02:27,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-06-05 14:02:27,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 706. [2021-06-05 14:02:27,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 3.1659574468085108) internal successors, (2232), 705 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:27,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2232 transitions. [2021-06-05 14:02:27,564 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2232 transitions. Word has length 18 [2021-06-05 14:02:27,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:27,564 INFO L482 AbstractCegarLoop]: Abstraction has 706 states and 2232 transitions. [2021-06-05 14:02:27,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:02:27,564 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2232 transitions. [2021-06-05 14:02:27,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:02:27,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:27,565 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:27,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6299 [2021-06-05 14:02:27,788 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:27,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:27,788 INFO L82 PathProgramCache]: Analyzing trace with hash 2050717319, now seen corresponding path program 150 times [2021-06-05 14:02:27,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:27,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236014684] [2021-06-05 14:02:27,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:27,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:27,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:27,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236014684] [2021-06-05 14:02:27,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236014684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:27,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444913384] [2021-06-05 14:02:27,915 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 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 14:02:27,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:02:27,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:27,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:02:27,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:28,262 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:28,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:02:28,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:28,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:28,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:28,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 14:02:28,404 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:28,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444913384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:28,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:28,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:02:28,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280579303] [2021-06-05 14:02:28,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:02:28,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:28,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:02:28,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:02:28,405 INFO L87 Difference]: Start difference. First operand 706 states and 2232 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:02:28,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:28,780 INFO L93 Difference]: Finished difference Result 817 states and 2547 transitions. [2021-06-05 14:02:28,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:02:28,781 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 18 [2021-06-05 14:02:28,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:28,782 INFO L225 Difference]: With dead ends: 817 [2021-06-05 14:02:28,782 INFO L226 Difference]: Without dead ends: 803 [2021-06-05 14:02:28,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 355.7ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:02:28,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-06-05 14:02:28,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 780. [2021-06-05 14:02:28,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.184852374839538) internal successors, (2481), 779 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:28,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2481 transitions. [2021-06-05 14:02:28,793 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2481 transitions. Word has length 18 [2021-06-05 14:02:28,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:28,793 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2481 transitions. [2021-06-05 14:02:28,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:02:28,793 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2481 transitions. [2021-06-05 14:02:28,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:02:28,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:28,794 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:29,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6402,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:29,013 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:29,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:29,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1500666617, now seen corresponding path program 151 times [2021-06-05 14:02:29,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:29,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744120581] [2021-06-05 14:02:29,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:29,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:29,109 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:29,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:29,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744120581] [2021-06-05 14:02:29,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744120581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:29,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224236770] [2021-06-05 14:02:29,110 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 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 14:02:29,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:29,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:02:29,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:29,436 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:29,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:02:29,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:29,953 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:02:29,954 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:02:29,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:02:30,139 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:02:30,142 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:30,142 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:30,159 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:02:30,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:30,159 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:02:30,191 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:30,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224236770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:30,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:30,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:02:30,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043048892] [2021-06-05 14:02:30,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:02:30,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:30,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:02:30,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:02:30,192 INFO L87 Difference]: Start difference. First operand 780 states and 2481 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:02:30,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:30,991 INFO L93 Difference]: Finished difference Result 881 states and 2702 transitions. [2021-06-05 14:02:30,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 14:02:30,991 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 18 [2021-06-05 14:02:30,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:30,993 INFO L225 Difference]: With dead ends: 881 [2021-06-05 14:02:30,993 INFO L226 Difference]: Without dead ends: 871 [2021-06-05 14:02:30,993 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 629.7ms TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:02:30,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-06-05 14:02:31,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 783. [2021-06-05 14:02:31,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 3.187979539641944) internal successors, (2493), 782 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:31,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 2493 transitions. [2021-06-05 14:02:31,002 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 2493 transitions. Word has length 18 [2021-06-05 14:02:31,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:31,002 INFO L482 AbstractCegarLoop]: Abstraction has 783 states and 2493 transitions. [2021-06-05 14:02:31,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:02:31,002 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 2493 transitions. [2021-06-05 14:02:31,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:02:31,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:31,003 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:31,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6446,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:31,204 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:31,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:31,204 INFO L82 PathProgramCache]: Analyzing trace with hash -649522485, now seen corresponding path program 152 times [2021-06-05 14:02:31,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:31,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657783271] [2021-06-05 14:02:31,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:31,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:31,340 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:31,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:31,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657783271] [2021-06-05 14:02:31,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657783271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:31,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812723261] [2021-06-05 14:02:31,340 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 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 14:02:31,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:02:31,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:31,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:02:31,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:31,673 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:31,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:02:31,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:32,134 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:02:32,134 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:02:32,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:02:32,493 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:02:32,495 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:32,495 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:32,510 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:02:32,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:32,511 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:02:32,537 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:32,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812723261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:32,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:32,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:02:32,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305754828] [2021-06-05 14:02:32,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:02:32,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:32,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:02:32,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:02:32,538 INFO L87 Difference]: Start difference. First operand 783 states and 2493 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:02:33,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:33,229 INFO L93 Difference]: Finished difference Result 914 states and 2779 transitions. [2021-06-05 14:02:33,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 14:02:33,230 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 18 [2021-06-05 14:02:33,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:33,231 INFO L225 Difference]: With dead ends: 914 [2021-06-05 14:02:33,231 INFO L226 Difference]: Without dead ends: 904 [2021-06-05 14:02:33,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 583.0ms TimeCoverageRelationStatistics Valid=188, Invalid=1534, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:02:33,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-06-05 14:02:33,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 808. [2021-06-05 14:02:33,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 3.195786864931846) internal successors, (2579), 807 states have internal predecessors, (2579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:33,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2579 transitions. [2021-06-05 14:02:33,240 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2579 transitions. Word has length 18 [2021-06-05 14:02:33,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:33,240 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 2579 transitions. [2021-06-05 14:02:33,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:02:33,240 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2579 transitions. [2021-06-05 14:02:33,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:02:33,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:33,241 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:33,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6564 [2021-06-05 14:02:33,442 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:33,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:33,442 INFO L82 PathProgramCache]: Analyzing trace with hash -33858169, now seen corresponding path program 153 times [2021-06-05 14:02:33,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:33,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182053459] [2021-06-05 14:02:33,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:33,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:33,539 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:33,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:33,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182053459] [2021-06-05 14:02:33,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182053459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:33,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253080811] [2021-06-05 14:02:33,540 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 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 14:02:33,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:02:33,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:33,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:02:33,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:33,892 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:33,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:02:34,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:34,279 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:02:34,279 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:02:34,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:02:34,409 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:02:34,411 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:34,412 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:34,427 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:02:34,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:34,427 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:02:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:34,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253080811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:34,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:34,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:02:34,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154115181] [2021-06-05 14:02:34,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:02:34,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:34,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:02:34,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:02:34,455 INFO L87 Difference]: Start difference. First operand 808 states and 2579 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:02:34,797 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-06-05 14:02:35,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:35,524 INFO L93 Difference]: Finished difference Result 960 states and 2894 transitions. [2021-06-05 14:02:35,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 14:02:35,525 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 18 [2021-06-05 14:02:35,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:35,526 INFO L225 Difference]: With dead ends: 960 [2021-06-05 14:02:35,526 INFO L226 Difference]: Without dead ends: 950 [2021-06-05 14:02:35,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 808.4ms TimeCoverageRelationStatistics Valid=206, Invalid=1516, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:02:35,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-06-05 14:02:35,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 829. [2021-06-05 14:02:35,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 3.1956521739130435) internal successors, (2646), 828 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:35,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2646 transitions. [2021-06-05 14:02:35,535 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2646 transitions. Word has length 18 [2021-06-05 14:02:35,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:35,535 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2646 transitions. [2021-06-05 14:02:35,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:02:35,535 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2646 transitions. [2021-06-05 14:02:35,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:02:35,536 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:35,536 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:35,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6715,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:35,737 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:35,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:35,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1871866443, now seen corresponding path program 154 times [2021-06-05 14:02:35,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:35,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090280080] [2021-06-05 14:02:35,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:35,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:36,113 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:02:36,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:36,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090280080] [2021-06-05 14:02:36,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090280080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:36,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084505837] [2021-06-05 14:02:36,113 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 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 14:02:36,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:02:36,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:36,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:02:36,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:36,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:36,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:02:36,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:36,742 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:02:36,742 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:02:36,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:02:37,481 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:02:37,486 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:37,487 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:37,505 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:02:37,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:37,506 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:02:37,538 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:37,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084505837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:37,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:37,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 14:02:37,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415345795] [2021-06-05 14:02:37,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:02:37,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:37,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:02:37,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:02:37,539 INFO L87 Difference]: Start difference. First operand 829 states and 2646 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:02:38,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:38,352 INFO L93 Difference]: Finished difference Result 966 states and 2916 transitions. [2021-06-05 14:02:38,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:02:38,352 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 18 [2021-06-05 14:02:38,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:38,354 INFO L225 Difference]: With dead ends: 966 [2021-06-05 14:02:38,354 INFO L226 Difference]: Without dead ends: 951 [2021-06-05 14:02:38,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1017.6ms TimeCoverageRelationStatistics Valid=228, Invalid=1494, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:02:38,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-05 14:02:38,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 835. [2021-06-05 14:02:38,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.1918465227817747) internal successors, (2662), 834 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:38,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2662 transitions. [2021-06-05 14:02:38,365 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2662 transitions. Word has length 18 [2021-06-05 14:02:38,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:38,366 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2662 transitions. [2021-06-05 14:02:38,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:02:38,366 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2662 transitions. [2021-06-05 14:02:38,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:02:38,367 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:38,367 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:38,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6814,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:38,581 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:38,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:38,581 INFO L82 PathProgramCache]: Analyzing trace with hash 819787271, now seen corresponding path program 155 times [2021-06-05 14:02:38,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:38,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280587067] [2021-06-05 14:02:38,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:38,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:38,768 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:38,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:38,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280587067] [2021-06-05 14:02:38,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280587067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:38,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680214534] [2021-06-05 14:02:38,768 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 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 14:02:38,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:02:38,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:38,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:02:38,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:39,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:39,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:02:39,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:39,492 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:02:39,492 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:02:39,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:02:39,662 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:02:39,664 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:39,665 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:39,681 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:02:39,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:39,682 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:02:39,712 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:39,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680214534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:39,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:39,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:02:39,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347955225] [2021-06-05 14:02:39,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:02:39,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:39,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:02:39,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:02:39,714 INFO L87 Difference]: Start difference. First operand 835 states and 2662 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:02:40,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:40,744 INFO L93 Difference]: Finished difference Result 1010 states and 3017 transitions. [2021-06-05 14:02:40,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:02:40,744 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-05 14:02:40,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:40,746 INFO L225 Difference]: With dead ends: 1010 [2021-06-05 14:02:40,746 INFO L226 Difference]: Without dead ends: 995 [2021-06-05 14:02:40,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1037.7ms TimeCoverageRelationStatistics Valid=312, Invalid=1850, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 14:02:40,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2021-06-05 14:02:40,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 835. [2021-06-05 14:02:40,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.1918465227817747) internal successors, (2662), 834 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:40,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2662 transitions. [2021-06-05 14:02:40,757 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2662 transitions. Word has length 18 [2021-06-05 14:02:40,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:40,757 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2662 transitions. [2021-06-05 14:02:40,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:02:40,757 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2662 transitions. [2021-06-05 14:02:40,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:02:40,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:40,758 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:40,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6954 [2021-06-05 14:02:40,977 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:40,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:40,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1729895989, now seen corresponding path program 156 times [2021-06-05 14:02:40,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:40,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596247409] [2021-06-05 14:02:40,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:40,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:41,140 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:41,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:41,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596247409] [2021-06-05 14:02:41,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596247409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:41,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569350293] [2021-06-05 14:02:41,141 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 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 14:02:41,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:02:41,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:41,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:02:41,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:41,505 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:41,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:02:41,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:42,119 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:02:42,119 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:02:42,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:02:42,312 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:02:42,315 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:42,315 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:42,332 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:02:42,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:42,332 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:02:42,362 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:42,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569350293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:42,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:42,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:02:42,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058230912] [2021-06-05 14:02:42,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:02:42,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:42,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:02:42,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:02:42,363 INFO L87 Difference]: Start difference. First operand 835 states and 2662 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:02:43,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:43,183 INFO L93 Difference]: Finished difference Result 964 states and 2957 transitions. [2021-06-05 14:02:43,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:02:43,184 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-05 14:02:43,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:43,185 INFO L225 Difference]: With dead ends: 964 [2021-06-05 14:02:43,185 INFO L226 Difference]: Without dead ends: 959 [2021-06-05 14:02:43,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 860.5ms TimeCoverageRelationStatistics Valid=224, Invalid=1258, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 14:02:43,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-06-05 14:02:43,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 835. [2021-06-05 14:02:43,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.1918465227817747) internal successors, (2662), 834 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:43,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2662 transitions. [2021-06-05 14:02:43,212 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2662 transitions. Word has length 18 [2021-06-05 14:02:43,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:43,212 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2662 transitions. [2021-06-05 14:02:43,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:02:43,213 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2662 transitions. [2021-06-05 14:02:43,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:02:43,214 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:43,214 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:43,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7060,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:43,457 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:43,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:43,457 INFO L82 PathProgramCache]: Analyzing trace with hash 834301575, now seen corresponding path program 157 times [2021-06-05 14:02:43,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:43,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257800430] [2021-06-05 14:02:43,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:43,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:43,568 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:43,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:43,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257800430] [2021-06-05 14:02:43,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257800430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:43,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652816403] [2021-06-05 14:02:43,568 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 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 14:02:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:43,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 14:02:43,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:43,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:43,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 14:02:44,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:44,350 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-06-05 14:02:44,350 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-06-05 14:02:44,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-06-05 14:02:44,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:02:44,723 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:02:44,723 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:44,740 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:02:44,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:02:44,741 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:115, output treesize:15 [2021-06-05 14:02:44,772 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:44,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652816403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:44,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:44,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 14:02:44,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990568328] [2021-06-05 14:02:44,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:02:44,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:44,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:02:44,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:02:44,773 INFO L87 Difference]: Start difference. First operand 835 states and 2662 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:02:45,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:45,552 INFO L93 Difference]: Finished difference Result 980 states and 3003 transitions. [2021-06-05 14:02:45,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:02:45,552 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 18 [2021-06-05 14:02:45,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:45,554 INFO L225 Difference]: With dead ends: 980 [2021-06-05 14:02:45,554 INFO L226 Difference]: Without dead ends: 975 [2021-06-05 14:02:45,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 863.1ms TimeCoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 14:02:45,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-06-05 14:02:45,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 837. [2021-06-05 14:02:45,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 3.187799043062201) internal successors, (2665), 836 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:45,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 2665 transitions. [2021-06-05 14:02:45,566 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 2665 transitions. Word has length 18 [2021-06-05 14:02:45,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:45,566 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 2665 transitions. [2021-06-05 14:02:45,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 14:02:45,566 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 2665 transitions. [2021-06-05 14:02:45,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:02:45,567 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:45,567 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:45,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7192,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:45,781 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:45,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:45,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1301661189, now seen corresponding path program 158 times [2021-06-05 14:02:45,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:45,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249769284] [2021-06-05 14:02:45,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:45,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:45,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:45,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249769284] [2021-06-05 14:02:45,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249769284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:45,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719521603] [2021-06-05 14:02:45,931 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 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 14:02:45,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:02:45,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:45,972 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:02:45,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:46,386 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:46,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:02:47,135 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 224 [2021-06-05 14:02:47,993 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 406 DAG size of output: 260 [2021-06-05 14:02:48,105 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 406 DAG size of output: 260 [2021-06-05 14:02:48,253 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 410 DAG size of output: 264 [2021-06-05 14:02:48,358 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 274 [2021-06-05 14:02:48,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:48,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:48,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:48,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:02:48,607 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:48,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719521603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:48,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:48,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:02:48,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921390483] [2021-06-05 14:02:48,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:02:48,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:48,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:02:48,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:02:48,608 INFO L87 Difference]: Start difference. First operand 837 states and 2665 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:48,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:48,921 INFO L93 Difference]: Finished difference Result 905 states and 2785 transitions. [2021-06-05 14:02:48,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:02:48,921 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:02:48,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:48,922 INFO L225 Difference]: With dead ends: 905 [2021-06-05 14:02:48,922 INFO L226 Difference]: Without dead ends: 883 [2021-06-05 14:02:48,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 449.1ms TimeCoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:02:48,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2021-06-05 14:02:48,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 840. [2021-06-05 14:02:48,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 3.1835518474374256) internal successors, (2671), 839 states have internal predecessors, (2671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:48,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2671 transitions. [2021-06-05 14:02:48,931 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2671 transitions. Word has length 19 [2021-06-05 14:02:48,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:48,932 INFO L482 AbstractCegarLoop]: Abstraction has 840 states and 2671 transitions. [2021-06-05 14:02:48,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:48,932 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2671 transitions. [2021-06-05 14:02:48,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:02:48,933 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:48,933 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:49,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7314,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:49,133 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:49,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:49,134 INFO L82 PathProgramCache]: Analyzing trace with hash -649128821, now seen corresponding path program 159 times [2021-06-05 14:02:49,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:49,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139439107] [2021-06-05 14:02:49,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:49,334 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:49,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:49,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139439107] [2021-06-05 14:02:49,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139439107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:49,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986672296] [2021-06-05 14:02:49,335 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 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 14:02:49,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:02:49,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:49,370 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 14:02:49,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:49,772 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:49,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:02:50,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:50,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:50,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:50,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:02:50,289 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:50,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986672296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:50,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:50,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:02:50,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378810787] [2021-06-05 14:02:50,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:02:50,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:50,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:02:50,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:02:50,290 INFO L87 Difference]: Start difference. First operand 840 states and 2671 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:50,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:50,842 INFO L93 Difference]: Finished difference Result 899 states and 2774 transitions. [2021-06-05 14:02:50,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:02:50,842 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:02:50,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:50,843 INFO L225 Difference]: With dead ends: 899 [2021-06-05 14:02:50,843 INFO L226 Difference]: Without dead ends: 880 [2021-06-05 14:02:50,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 562.4ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:02:50,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-06-05 14:02:50,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 842. [2021-06-05 14:02:50,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.1712247324613556) internal successors, (2667), 841 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:50,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2667 transitions. [2021-06-05 14:02:50,852 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2667 transitions. Word has length 19 [2021-06-05 14:02:50,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:50,852 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2667 transitions. [2021-06-05 14:02:50,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:50,852 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2667 transitions. [2021-06-05 14:02:50,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:02:50,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:50,853 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:51,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7594,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:51,053 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:51,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:51,054 INFO L82 PathProgramCache]: Analyzing trace with hash 203204603, now seen corresponding path program 160 times [2021-06-05 14:02:51,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:51,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514091188] [2021-06-05 14:02:51,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:51,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:51,204 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:51,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:51,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514091188] [2021-06-05 14:02:51,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514091188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:51,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326693414] [2021-06-05 14:02:51,204 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 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 14:02:51,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:02:51,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:51,230 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:02:51,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:51,588 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:51,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:02:52,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:52,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:52,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:52,417 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:02:52,421 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:52,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326693414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:52,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:52,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:02:52,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905000337] [2021-06-05 14:02:52,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:02:52,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:52,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:02:52,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:02:52,422 INFO L87 Difference]: Start difference. First operand 842 states and 2667 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:52,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:52,810 INFO L93 Difference]: Finished difference Result 889 states and 2752 transitions. [2021-06-05 14:02:52,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:02:52,810 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:02:52,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:52,811 INFO L225 Difference]: With dead ends: 889 [2021-06-05 14:02:52,811 INFO L226 Difference]: Without dead ends: 878 [2021-06-05 14:02:52,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 484.8ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:02:52,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-06-05 14:02:52,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 843. [2021-06-05 14:02:52,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 3.16270783847981) internal successors, (2663), 842 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:52,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 2663 transitions. [2021-06-05 14:02:52,820 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 2663 transitions. Word has length 19 [2021-06-05 14:02:52,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:52,820 INFO L482 AbstractCegarLoop]: Abstraction has 843 states and 2663 transitions. [2021-06-05 14:02:52,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:52,820 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 2663 transitions. [2021-06-05 14:02:52,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:02:52,821 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:52,821 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:53,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7704 [2021-06-05 14:02:53,021 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:53,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:53,022 INFO L82 PathProgramCache]: Analyzing trace with hash 946787963, now seen corresponding path program 161 times [2021-06-05 14:02:53,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:53,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792011383] [2021-06-05 14:02:53,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:53,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:53,152 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:53,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:53,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792011383] [2021-06-05 14:02:53,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792011383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:53,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722207235] [2021-06-05 14:02:53,152 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 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 14:02:53,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:02:53,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:53,179 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:02:53,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:53,539 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:02:53,540 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:53,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:02:55,095 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 210 [2021-06-05 14:02:56,048 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 258 [2021-06-05 14:02:56,195 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 277 [2021-06-05 14:02:56,415 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 302 [2021-06-05 14:02:56,773 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 636 DAG size of output: 419 [2021-06-05 14:02:57,271 WARN L205 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 744 DAG size of output: 519 [2021-06-05 14:02:57,786 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 744 DAG size of output: 519 [2021-06-05 14:02:58,337 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 751 DAG size of output: 526 [2021-06-05 14:02:58,561 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 236 [2021-06-05 14:02:59,621 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 233 [2021-06-05 14:02:59,737 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 233 [2021-06-05 14:02:59,870 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 214 [2021-06-05 14:03:00,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:00,168 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:00,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:00,532 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:00,554 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:03:00,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:03:00,555 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:03:00,589 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:00,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722207235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:00,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:00,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:03:00,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487941605] [2021-06-05 14:03:00,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:03:00,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:00,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:03:00,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:03:00,590 INFO L87 Difference]: Start difference. First operand 843 states and 2663 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:01,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:01,036 INFO L93 Difference]: Finished difference Result 922 states and 2811 transitions. [2021-06-05 14:03:01,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:03:01,037 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:03:01,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:01,038 INFO L225 Difference]: With dead ends: 922 [2021-06-05 14:03:01,038 INFO L226 Difference]: Without dead ends: 910 [2021-06-05 14:03:01,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 412.4ms TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:03:01,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2021-06-05 14:03:01,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 839. [2021-06-05 14:03:01,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 838 states have (on average 3.1658711217183773) internal successors, (2653), 838 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:01,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 2653 transitions. [2021-06-05 14:03:01,046 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 2653 transitions. Word has length 19 [2021-06-05 14:03:01,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:01,046 INFO L482 AbstractCegarLoop]: Abstraction has 839 states and 2653 transitions. [2021-06-05 14:03:01,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:01,047 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 2653 transitions. [2021-06-05 14:03:01,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:03:01,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:01,047 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:01,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7885 [2021-06-05 14:03:01,248 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:01,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:01,248 INFO L82 PathProgramCache]: Analyzing trace with hash 274927871, now seen corresponding path program 162 times [2021-06-05 14:03:01,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:01,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803276909] [2021-06-05 14:03:01,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:01,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:01,365 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:01,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:01,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803276909] [2021-06-05 14:03:01,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803276909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:01,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31555668] [2021-06-05 14:03:01,365 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 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 14:03:01,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:03:01,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:01,392 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:03:01,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:01,834 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:03:01,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:01,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:03:02,460 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 272 [2021-06-05 14:03:02,945 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 251 [2021-06-05 14:03:03,233 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 424 [2021-06-05 14:03:03,479 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 424 [2021-06-05 14:03:03,807 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 435 [2021-06-05 14:03:05,087 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 437 DAG size of output: 488 [2021-06-05 14:03:05,380 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 323 [2021-06-05 14:03:05,917 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 168 [2021-06-05 14:03:06,339 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 237 [2021-06-05 14:03:07,257 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 495 DAG size of output: 330 [2021-06-05 14:03:07,414 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 283 [2021-06-05 14:03:07,979 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 212 [2021-06-05 14:03:09,116 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 742 DAG size of output: 479 [2021-06-05 14:03:09,770 WARN L205 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 1022 DAG size of output: 629 [2021-06-05 14:03:10,274 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 1022 DAG size of output: 629 [2021-06-05 14:03:10,804 WARN L205 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 1027 DAG size of output: 634 [2021-06-05 14:03:11,253 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 636 DAG size of output: 534 [2021-06-05 14:03:12,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:12,223 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:12,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:12,799 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:12,818 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:03:12,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:03:12,818 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:03:12,848 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:12,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31555668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:12,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:12,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:03:12,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824560445] [2021-06-05 14:03:12,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:03:12,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:12,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:03:12,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:03:12,848 INFO L87 Difference]: Start difference. First operand 839 states and 2653 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:13,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:13,367 INFO L93 Difference]: Finished difference Result 960 states and 2881 transitions. [2021-06-05 14:03:13,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:03:13,367 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:03:13,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:13,368 INFO L225 Difference]: With dead ends: 960 [2021-06-05 14:03:13,368 INFO L226 Difference]: Without dead ends: 946 [2021-06-05 14:03:13,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 508.2ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:03:13,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-06-05 14:03:13,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 844. [2021-06-05 14:03:13,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 3.1589561091340452) internal successors, (2663), 843 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:13,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 2663 transitions. [2021-06-05 14:03:13,377 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 2663 transitions. Word has length 19 [2021-06-05 14:03:13,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:13,377 INFO L482 AbstractCegarLoop]: Abstraction has 844 states and 2663 transitions. [2021-06-05 14:03:13,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:13,377 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 2663 transitions. [2021-06-05 14:03:13,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:03:13,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:13,378 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:13,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8577 [2021-06-05 14:03:13,579 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:13,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:13,579 INFO L82 PathProgramCache]: Analyzing trace with hash -386335912, now seen corresponding path program 163 times [2021-06-05 14:03:13,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:13,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547372788] [2021-06-05 14:03:13,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:13,624 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:13,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:13,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547372788] [2021-06-05 14:03:13,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547372788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:13,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293477882] [2021-06-05 14:03:13,625 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 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 14:03:13,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:13,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:03:13,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:13,681 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:13,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293477882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:13,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:13,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:03:13,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942665638] [2021-06-05 14:03:13,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:03:13,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:13,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:03:13,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:03:13,682 INFO L87 Difference]: Start difference. First operand 844 states and 2663 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:13,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:13,737 INFO L93 Difference]: Finished difference Result 1106 states and 3133 transitions. [2021-06-05 14:03:13,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:03:13,737 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 14:03:13,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:13,738 INFO L225 Difference]: With dead ends: 1106 [2021-06-05 14:03:13,738 INFO L226 Difference]: Without dead ends: 1106 [2021-06-05 14:03:13,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 46.1ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:03:13,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-06-05 14:03:13,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 852. [2021-06-05 14:03:13,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.1656874265569916) internal successors, (2694), 851 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:13,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2694 transitions. [2021-06-05 14:03:13,750 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2694 transitions. Word has length 19 [2021-06-05 14:03:13,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:13,750 INFO L482 AbstractCegarLoop]: Abstraction has 852 states and 2694 transitions. [2021-06-05 14:03:13,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:13,750 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2694 transitions. [2021-06-05 14:03:13,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:03:13,751 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:13,751 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:13,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9440,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:13,964 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:13,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:13,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1288290309, now seen corresponding path program 164 times [2021-06-05 14:03:13,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:13,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259999169] [2021-06-05 14:03:13,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:13,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:03:14,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:14,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259999169] [2021-06-05 14:03:14,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259999169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:14,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023218241] [2021-06-05 14:03:14,082 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 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 14:03:14,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:03:14,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:14,118 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:03:14,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:14,403 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:14,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:14,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:14,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:14,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:14,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:03:14,851 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:14,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023218241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:14,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:14,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:03:14,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698954559] [2021-06-05 14:03:14,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:03:14,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:14,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:03:14,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:03:14,852 INFO L87 Difference]: Start difference. First operand 852 states and 2694 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:15,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:15,236 INFO L93 Difference]: Finished difference Result 911 states and 2818 transitions. [2021-06-05 14:03:15,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:03:15,236 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:03:15,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:15,238 INFO L225 Difference]: With dead ends: 911 [2021-06-05 14:03:15,238 INFO L226 Difference]: Without dead ends: 900 [2021-06-05 14:03:15,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 391.2ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:03:15,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2021-06-05 14:03:15,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 856. [2021-06-05 14:03:15,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 3.160233918128655) internal successors, (2702), 855 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:15,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2702 transitions. [2021-06-05 14:03:15,279 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2702 transitions. Word has length 19 [2021-06-05 14:03:15,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:15,279 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2702 transitions. [2021-06-05 14:03:15,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:15,279 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2702 transitions. [2021-06-05 14:03:15,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:03:15,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:15,280 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:15,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9441 [2021-06-05 14:03:15,481 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:15,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:15,481 INFO L82 PathProgramCache]: Analyzing trace with hash -544706949, now seen corresponding path program 165 times [2021-06-05 14:03:15,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:15,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216913506] [2021-06-05 14:03:15,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:15,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:15,600 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:03:15,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:15,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216913506] [2021-06-05 14:03:15,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216913506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:15,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556269374] [2021-06-05 14:03:15,600 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 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 14:03:15,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:03:15,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:15,635 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:03:15,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:16,020 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:03:16,020 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:16,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:03:17,622 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 248 [2021-06-05 14:03:17,835 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 334 [2021-06-05 14:03:19,017 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 242 [2021-06-05 14:03:19,409 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 700 DAG size of output: 443 [2021-06-05 14:03:19,871 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 724 DAG size of output: 463 [2021-06-05 14:03:20,299 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 724 DAG size of output: 463 [2021-06-05 14:03:20,846 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 731 DAG size of output: 470 [2021-06-05 14:03:21,444 WARN L205 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 525 [2021-06-05 14:03:21,892 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 435 DAG size of output: 504 [2021-06-05 14:03:22,431 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 259 [2021-06-05 14:03:22,677 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 494 DAG size of output: 288 [2021-06-05 14:03:22,858 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 553 DAG size of output: 334 [2021-06-05 14:03:23,059 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 553 DAG size of output: 334 [2021-06-05 14:03:23,179 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 559 DAG size of output: 223 [2021-06-05 14:03:23,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:23,435 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:23,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:23,744 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:23,763 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:03:23,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:03:23,763 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:03:23,794 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:23,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556269374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:23,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:23,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:03:23,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189463004] [2021-06-05 14:03:23,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:03:23,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:23,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:03:23,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:03:23,795 INFO L87 Difference]: Start difference. First operand 856 states and 2702 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:24,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:24,248 INFO L93 Difference]: Finished difference Result 946 states and 2880 transitions. [2021-06-05 14:03:24,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:03:24,249 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:03:24,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:24,250 INFO L225 Difference]: With dead ends: 946 [2021-06-05 14:03:24,250 INFO L226 Difference]: Without dead ends: 936 [2021-06-05 14:03:24,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 427.0ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:03:24,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-06-05 14:03:24,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 858. [2021-06-05 14:03:24,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.156359393232205) internal successors, (2705), 857 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:24,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2705 transitions. [2021-06-05 14:03:24,259 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2705 transitions. Word has length 19 [2021-06-05 14:03:24,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:24,259 INFO L482 AbstractCegarLoop]: Abstraction has 858 states and 2705 transitions. [2021-06-05 14:03:24,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:24,259 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2705 transitions. [2021-06-05 14:03:24,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:03:24,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:24,260 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:24,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9533 [2021-06-05 14:03:24,460 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:24,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:24,461 INFO L82 PathProgramCache]: Analyzing trace with hash 306437183, now seen corresponding path program 166 times [2021-06-05 14:03:24,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:24,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925575294] [2021-06-05 14:03:24,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:24,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:24,603 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:24,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:24,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925575294] [2021-06-05 14:03:24,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925575294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:24,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910514935] [2021-06-05 14:03:24,604 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 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 14:03:24,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:03:24,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:24,642 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:03:24,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:25,014 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:25,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:03:26,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:26,818 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:26,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:27,791 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:27,810 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:03:27,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:03:27,811 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:03:27,840 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:27,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910514935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:27,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:27,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:03:27,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390105853] [2021-06-05 14:03:27,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:03:27,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:27,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:03:27,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:03:27,842 INFO L87 Difference]: Start difference. First operand 858 states and 2705 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:28,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:28,419 INFO L93 Difference]: Finished difference Result 1017 states and 3020 transitions. [2021-06-05 14:03:28,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:03:28,420 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:03:28,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:28,421 INFO L225 Difference]: With dead ends: 1017 [2021-06-05 14:03:28,421 INFO L226 Difference]: Without dead ends: 1005 [2021-06-05 14:03:28,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 524.4ms TimeCoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:03:28,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-06-05 14:03:28,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 867. [2021-06-05 14:03:28,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 3.147806004618938) internal successors, (2726), 866 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:28,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2726 transitions. [2021-06-05 14:03:28,432 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2726 transitions. Word has length 19 [2021-06-05 14:03:28,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:28,432 INFO L482 AbstractCegarLoop]: Abstraction has 867 states and 2726 transitions. [2021-06-05 14:03:28,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:28,432 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2726 transitions. [2021-06-05 14:03:28,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:03:28,433 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:28,433 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:28,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10224 [2021-06-05 14:03:28,634 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:28,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:28,634 INFO L82 PathProgramCache]: Analyzing trace with hash 922101499, now seen corresponding path program 167 times [2021-06-05 14:03:28,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:28,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374201360] [2021-06-05 14:03:28,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:28,749 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:28,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:28,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374201360] [2021-06-05 14:03:28,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374201360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:28,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114821180] [2021-06-05 14:03:28,749 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 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 14:03:28,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:03:28,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:28,776 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:03:28,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:29,108 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:29,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:03:29,746 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 435 DAG size of output: 323 [2021-06-05 14:03:29,858 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 333 [2021-06-05 14:03:29,968 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 333 [2021-06-05 14:03:30,104 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 344 [2021-06-05 14:03:30,292 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 379 [2021-06-05 14:03:30,423 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 336 [2021-06-05 14:03:31,535 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 323 [2021-06-05 14:03:31,695 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 323 [2021-06-05 14:03:31,830 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 277 [2021-06-05 14:03:32,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:32,305 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:32,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:32,833 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:32,852 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:03:32,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:03:32,852 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:03:32,882 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:32,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114821180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:32,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:32,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:03:32,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692249625] [2021-06-05 14:03:32,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:03:32,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:32,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:03:32,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:03:32,882 INFO L87 Difference]: Start difference. First operand 867 states and 2726 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:33,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:33,605 INFO L93 Difference]: Finished difference Result 1037 states and 3076 transitions. [2021-06-05 14:03:33,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 14:03:33,605 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:03:33,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:33,607 INFO L225 Difference]: With dead ends: 1037 [2021-06-05 14:03:33,607 INFO L226 Difference]: Without dead ends: 1021 [2021-06-05 14:03:33,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 606.5ms TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:03:33,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2021-06-05 14:03:33,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 884. [2021-06-05 14:03:33,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.1540203850509627) internal successors, (2785), 883 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:33,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2785 transitions. [2021-06-05 14:03:33,617 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2785 transitions. Word has length 19 [2021-06-05 14:03:33,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:33,617 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 2785 transitions. [2021-06-05 14:03:33,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:33,617 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2785 transitions. [2021-06-05 14:03:33,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:03:33,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:33,618 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:33,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10615 [2021-06-05 14:03:33,818 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:33,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:33,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1879280894, now seen corresponding path program 168 times [2021-06-05 14:03:33,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:33,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082926797] [2021-06-05 14:03:33,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:33,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:33,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:33,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082926797] [2021-06-05 14:03:33,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082926797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:33,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653953938] [2021-06-05 14:03:33,880 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 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 14:03:33,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:03:33,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:33,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:03:33,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:33,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653953938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:33,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:33,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:03:33,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316788526] [2021-06-05 14:03:33,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:03:33,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:33,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:03:33,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:03:33,959 INFO L87 Difference]: Start difference. First operand 884 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:34,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:34,057 INFO L93 Difference]: Finished difference Result 1214 states and 3399 transitions. [2021-06-05 14:03:34,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:03:34,057 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 14:03:34,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:34,059 INFO L225 Difference]: With dead ends: 1214 [2021-06-05 14:03:34,059 INFO L226 Difference]: Without dead ends: 1214 [2021-06-05 14:03:34,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:03:34,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2021-06-05 14:03:34,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 897. [2021-06-05 14:03:34,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.1595982142857144) internal successors, (2831), 896 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:34,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 2831 transitions. [2021-06-05 14:03:34,072 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 2831 transitions. Word has length 19 [2021-06-05 14:03:34,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:34,072 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 2831 transitions. [2021-06-05 14:03:34,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:34,072 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 2831 transitions. [2021-06-05 14:03:34,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:03:34,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:34,073 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:34,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11027 [2021-06-05 14:03:34,293 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:34,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:34,293 INFO L82 PathProgramCache]: Analyzing trace with hash -311501637, now seen corresponding path program 169 times [2021-06-05 14:03:34,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:34,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919951200] [2021-06-05 14:03:34,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:34,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:34,456 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:34,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:34,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919951200] [2021-06-05 14:03:34,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919951200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:34,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682584723] [2021-06-05 14:03:34,456 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 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 14:03:34,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:34,500 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:03:34,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:34,937 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-06-05 14:03:35,229 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:35,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:36,929 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 243 [2021-06-05 14:03:37,094 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 506 DAG size of output: 265 [2021-06-05 14:03:37,267 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 506 DAG size of output: 265 [2021-06-05 14:03:37,459 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 269 [2021-06-05 14:03:37,612 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 267 [2021-06-05 14:03:37,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:37,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:37,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:37,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:03:37,845 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:37,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682584723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:37,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:37,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:03:37,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347295090] [2021-06-05 14:03:37,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:03:37,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:37,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:03:37,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:03:37,846 INFO L87 Difference]: Start difference. First operand 897 states and 2831 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:38,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:38,379 INFO L93 Difference]: Finished difference Result 956 states and 2950 transitions. [2021-06-05 14:03:38,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:03:38,379 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:03:38,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:38,380 INFO L225 Difference]: With dead ends: 956 [2021-06-05 14:03:38,380 INFO L226 Difference]: Without dead ends: 943 [2021-06-05 14:03:38,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 869.8ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:03:38,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-06-05 14:03:38,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 899. [2021-06-05 14:03:38,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.1492204899777283) internal successors, (2828), 898 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:38,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2828 transitions. [2021-06-05 14:03:38,392 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2828 transitions. Word has length 19 [2021-06-05 14:03:38,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:38,392 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 2828 transitions. [2021-06-05 14:03:38,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:38,392 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2828 transitions. [2021-06-05 14:03:38,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:03:38,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:38,394 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:38,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11028 [2021-06-05 14:03:38,616 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:38,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:38,616 INFO L82 PathProgramCache]: Analyzing trace with hash 432081723, now seen corresponding path program 170 times [2021-06-05 14:03:38,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:38,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280706483] [2021-06-05 14:03:38,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:38,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:38,736 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:03:38,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:38,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280706483] [2021-06-05 14:03:38,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280706483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:38,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677708593] [2021-06-05 14:03:38,737 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 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 14:03:38,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:03:38,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:38,769 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:03:38,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:39,130 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:03:39,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:39,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:03:39,764 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 246 [2021-06-05 14:03:39,913 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 197 [2021-06-05 14:03:40,821 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 225 [2021-06-05 14:03:41,187 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 297 [2021-06-05 14:03:41,423 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 496 DAG size of output: 341 [2021-06-05 14:03:41,761 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 390 [2021-06-05 14:03:42,082 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 390 [2021-06-05 14:03:42,448 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 583 DAG size of output: 395 [2021-06-05 14:03:42,846 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 447 [2021-06-05 14:03:43,180 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 241 [2021-06-05 14:03:43,613 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 182 [2021-06-05 14:03:43,720 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 182 [2021-06-05 14:03:43,840 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 186 [2021-06-05 14:03:44,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:44,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:44,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:44,856 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:44,878 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:03:44,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:03:44,879 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:03:44,916 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:44,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677708593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:44,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:44,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:03:44,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21625605] [2021-06-05 14:03:44,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:03:44,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:44,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:03:44,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:03:44,921 INFO L87 Difference]: Start difference. First operand 899 states and 2828 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:45,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:45,512 INFO L93 Difference]: Finished difference Result 1019 states and 3082 transitions. [2021-06-05 14:03:45,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:03:45,513 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:03:45,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:45,514 INFO L225 Difference]: With dead ends: 1019 [2021-06-05 14:03:45,514 INFO L226 Difference]: Without dead ends: 1009 [2021-06-05 14:03:45,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 529.2ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:03:45,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-06-05 14:03:45,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 899. [2021-06-05 14:03:45,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.1492204899777283) internal successors, (2828), 898 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:45,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2828 transitions. [2021-06-05 14:03:45,527 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2828 transitions. Word has length 19 [2021-06-05 14:03:45,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:45,527 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 2828 transitions. [2021-06-05 14:03:45,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:45,527 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2828 transitions. [2021-06-05 14:03:45,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:03:45,528 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:45,528 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:45,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11323 [2021-06-05 14:03:45,752 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:45,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:45,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1283225855, now seen corresponding path program 171 times [2021-06-05 14:03:45,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:45,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418188968] [2021-06-05 14:03:45,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:45,896 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:45,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:45,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418188968] [2021-06-05 14:03:45,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418188968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:45,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338635669] [2021-06-05 14:03:45,897 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 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 14:03:45,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:03:45,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:45,931 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:03:45,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:46,328 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:03:46,328 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:46,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:03:47,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:47,799 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:47,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:48,396 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:48,417 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:03:48,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:03:48,418 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:03:48,452 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:48,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338635669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:48,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:48,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:03:48,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303269720] [2021-06-05 14:03:48,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:03:48,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:48,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:03:48,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:03:48,453 INFO L87 Difference]: Start difference. First operand 899 states and 2828 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:49,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:49,223 INFO L93 Difference]: Finished difference Result 1100 states and 3241 transitions. [2021-06-05 14:03:49,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:03:49,224 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:03:49,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:49,226 INFO L225 Difference]: With dead ends: 1100 [2021-06-05 14:03:49,226 INFO L226 Difference]: Without dead ends: 1081 [2021-06-05 14:03:49,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 670.4ms TimeCoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:03:49,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-06-05 14:03:49,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 899. [2021-06-05 14:03:49,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.1447661469933186) internal successors, (2824), 898 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:49,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2824 transitions. [2021-06-05 14:03:49,238 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2824 transitions. Word has length 19 [2021-06-05 14:03:49,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:49,239 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 2824 transitions. [2021-06-05 14:03:49,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:49,239 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2824 transitions. [2021-06-05 14:03:49,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:03:49,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:49,240 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:49,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11806,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:49,464 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:49,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:49,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1898890171, now seen corresponding path program 172 times [2021-06-05 14:03:49,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:49,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207674919] [2021-06-05 14:03:49,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:49,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:49,591 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:49,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:49,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207674919] [2021-06-05 14:03:49,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207674919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:49,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280605194] [2021-06-05 14:03:49,592 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 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 14:03:49,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:03:49,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:49,625 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:03:49,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:50,033 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:03:50,033 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:50,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:03:50,605 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 270 [2021-06-05 14:03:50,749 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 270 [2021-06-05 14:03:50,875 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 281 [2021-06-05 14:03:51,105 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 287 [2021-06-05 14:03:51,541 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 199 [2021-06-05 14:03:51,689 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 199 [2021-06-05 14:03:51,859 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 204 [2021-06-05 14:03:51,980 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 253 [2021-06-05 14:03:52,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:52,799 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:52,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:53,334 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:53,353 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:03:53,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:03:53,354 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:03:53,387 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:53,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280605194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:53,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:53,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:03:53,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357878027] [2021-06-05 14:03:53,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:03:53,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:53,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:03:53,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:03:53,388 INFO L87 Difference]: Start difference. First operand 899 states and 2824 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:54,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:54,121 INFO L93 Difference]: Finished difference Result 1077 states and 3204 transitions. [2021-06-05 14:03:54,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 14:03:54,122 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:03:54,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:54,123 INFO L225 Difference]: With dead ends: 1077 [2021-06-05 14:03:54,123 INFO L226 Difference]: Without dead ends: 1067 [2021-06-05 14:03:54,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 729.6ms TimeCoverageRelationStatistics Valid=217, Invalid=1505, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:03:54,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-06-05 14:03:54,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 919. [2021-06-05 14:03:54,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 3.1525054466230937) internal successors, (2894), 918 states have internal predecessors, (2894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:54,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2894 transitions. [2021-06-05 14:03:54,133 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2894 transitions. Word has length 19 [2021-06-05 14:03:54,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:54,133 INFO L482 AbstractCegarLoop]: Abstraction has 919 states and 2894 transitions. [2021-06-05 14:03:54,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:54,133 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2894 transitions. [2021-06-05 14:03:54,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:03:54,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:54,135 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:54,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12108 [2021-06-05 14:03:54,349 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:54,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:54,349 INFO L82 PathProgramCache]: Analyzing trace with hash -490352513, now seen corresponding path program 173 times [2021-06-05 14:03:54,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:54,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868399596] [2021-06-05 14:03:54,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:54,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:54,459 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:54,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:54,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868399596] [2021-06-05 14:03:54,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868399596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:54,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756505521] [2021-06-05 14:03:54,459 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 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 14:03:54,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:03:54,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:54,486 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:03:54,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:54,888 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:03:54,888 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:54,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:03:56,561 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 328 [2021-06-05 14:03:56,739 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 343 [2021-06-05 14:03:56,915 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 343 [2021-06-05 14:03:57,132 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 350 [2021-06-05 14:03:57,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:03:57,727 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:57,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:03:58,014 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:58,033 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:03:58,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:03:58,034 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:03:58,063 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:58,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756505521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:58,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:58,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:03:58,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131528434] [2021-06-05 14:03:58,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:03:58,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:58,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:03:58,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:03:58,064 INFO L87 Difference]: Start difference. First operand 919 states and 2894 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:58,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:58,776 INFO L93 Difference]: Finished difference Result 1009 states and 3050 transitions. [2021-06-05 14:03:58,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:03:58,776 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:03:58,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:58,777 INFO L225 Difference]: With dead ends: 1009 [2021-06-05 14:03:58,777 INFO L226 Difference]: Without dead ends: 999 [2021-06-05 14:03:58,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 707.5ms TimeCoverageRelationStatistics Valid=207, Invalid=1275, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 14:03:58,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-06-05 14:03:58,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 919. [2021-06-05 14:03:58,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 3.1525054466230937) internal successors, (2894), 918 states have internal predecessors, (2894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:58,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2894 transitions. [2021-06-05 14:03:58,788 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2894 transitions. Word has length 19 [2021-06-05 14:03:58,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:58,789 INFO L482 AbstractCegarLoop]: Abstraction has 919 states and 2894 transitions. [2021-06-05 14:03:58,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:58,789 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2894 transitions. [2021-06-05 14:03:58,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:03:58,790 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:58,790 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:58,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12492,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:58,997 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:58,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:58,997 INFO L82 PathProgramCache]: Analyzing trace with hash -901042152, now seen corresponding path program 174 times [2021-06-05 14:03:58,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:58,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574904322] [2021-06-05 14:03:58,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:58,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:59,046 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:59,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:59,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574904322] [2021-06-05 14:03:59,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574904322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:59,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076966352] [2021-06-05 14:03:59,047 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 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 14:03:59,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:03:59,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:59,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:03:59,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:59,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076966352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:59,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:59,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:03:59,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221032717] [2021-06-05 14:03:59,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:03:59,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:59,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:03:59,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:03:59,123 INFO L87 Difference]: Start difference. First operand 919 states and 2894 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:59,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:59,223 INFO L93 Difference]: Finished difference Result 1576 states and 4658 transitions. [2021-06-05 14:03:59,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:03:59,223 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 14:03:59,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:59,225 INFO L225 Difference]: With dead ends: 1576 [2021-06-05 14:03:59,225 INFO L226 Difference]: Without dead ends: 1576 [2021-06-05 14:03:59,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:03:59,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2021-06-05 14:03:59,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1265. [2021-06-05 14:03:59,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 3.2207278481012658) internal successors, (4071), 1264 states have internal predecessors, (4071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:59,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 4071 transitions. [2021-06-05 14:03:59,239 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 4071 transitions. Word has length 19 [2021-06-05 14:03:59,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:59,239 INFO L482 AbstractCegarLoop]: Abstraction has 1265 states and 4071 transitions. [2021-06-05 14:03:59,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:03:59,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 4071 transitions. [2021-06-05 14:03:59,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:03:59,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:59,240 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:59,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12939 [2021-06-05 14:03:59,441 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:59,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:59,441 INFO L82 PathProgramCache]: Analyzing trace with hash -95823877, now seen corresponding path program 175 times [2021-06-05 14:03:59,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:59,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28789527] [2021-06-05 14:03:59,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:59,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:59,571 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:03:59,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:59,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28789527] [2021-06-05 14:03:59,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28789527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:59,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811858090] [2021-06-05 14:03:59,571 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 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 14:03:59,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:59,596 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:03:59,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:59,894 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:59,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:04:00,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:00,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:00,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:04:00,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:04:00,464 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:00,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811858090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:00,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:00,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:04:00,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302400847] [2021-06-05 14:04:00,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:04:00,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:00,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:04:00,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:04:00,464 INFO L87 Difference]: Start difference. First operand 1265 states and 4071 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:00,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:00,943 INFO L93 Difference]: Finished difference Result 1300 states and 4138 transitions. [2021-06-05 14:04:00,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:04:00,943 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:04:00,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:00,944 INFO L225 Difference]: With dead ends: 1300 [2021-06-05 14:04:00,944 INFO L226 Difference]: Without dead ends: 1287 [2021-06-05 14:04:00,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 423.8ms TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:04:00,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-06-05 14:04:00,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1265. [2021-06-05 14:04:00,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 3.2056962025316458) internal successors, (4052), 1264 states have internal predecessors, (4052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:00,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 4052 transitions. [2021-06-05 14:04:00,957 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 4052 transitions. Word has length 19 [2021-06-05 14:04:00,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:00,957 INFO L482 AbstractCegarLoop]: Abstraction has 1265 states and 4052 transitions. [2021-06-05 14:04:00,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:00,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 4052 transitions. [2021-06-05 14:04:00,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:00,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:00,958 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:01,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12940 [2021-06-05 14:04:01,159 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:01,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:01,159 INFO L82 PathProgramCache]: Analyzing trace with hash 647759483, now seen corresponding path program 176 times [2021-06-05 14:04:01,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:01,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187879347] [2021-06-05 14:04:01,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:01,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:01,279 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:01,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:01,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187879347] [2021-06-05 14:04:01,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187879347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:01,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498776273] [2021-06-05 14:04:01,280 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 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 14:04:01,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:01,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:01,304 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:04:01,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:01,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:01,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:04:02,786 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 244 [2021-06-05 14:04:02,905 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 244 [2021-06-05 14:04:03,037 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 249 [2021-06-05 14:04:03,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:04:03,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:03,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:04:04,220 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:04,239 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:04:04,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:04:04,239 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:04:04,269 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:04,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498776273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:04,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:04,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:04:04,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884744445] [2021-06-05 14:04:04,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:04:04,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:04,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:04:04,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:04:04,270 INFO L87 Difference]: Start difference. First operand 1265 states and 4052 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:04,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:04,776 INFO L93 Difference]: Finished difference Result 1377 states and 4307 transitions. [2021-06-05 14:04:04,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:04:04,776 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:04:04,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:04,777 INFO L225 Difference]: With dead ends: 1377 [2021-06-05 14:04:04,777 INFO L226 Difference]: Without dead ends: 1365 [2021-06-05 14:04:04,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 442.7ms TimeCoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:04:04,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-06-05 14:04:04,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1263. [2021-06-05 14:04:04,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1263 states, 1262 states have (on average 3.2044374009508716) internal successors, (4044), 1262 states have internal predecessors, (4044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:04,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 4044 transitions. [2021-06-05 14:04:04,790 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 4044 transitions. Word has length 19 [2021-06-05 14:04:04,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:04,790 INFO L482 AbstractCegarLoop]: Abstraction has 1263 states and 4044 transitions. [2021-06-05 14:04:04,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:04,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 4044 transitions. [2021-06-05 14:04:04,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:04,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:04,791 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:04,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13055 [2021-06-05 14:04:04,993 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:04,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:04,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1498903615, now seen corresponding path program 177 times [2021-06-05 14:04:04,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:04,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025771013] [2021-06-05 14:04:04,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:04,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:05,091 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:05,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:05,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025771013] [2021-06-05 14:04:05,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025771013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:05,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787046557] [2021-06-05 14:04:05,092 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 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 14:04:05,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:04:05,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:05,117 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:04:05,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:05,456 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:04:05,457 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:05,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:04:06,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:04:06,718 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:06,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:04:07,638 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:07,657 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:04:07,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:04:07,658 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:04:07,687 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:07,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787046557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:07,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:07,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:04:07,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676895480] [2021-06-05 14:04:07,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:04:07,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:07,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:04:07,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:04:07,687 INFO L87 Difference]: Start difference. First operand 1263 states and 4044 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:08,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:08,310 INFO L93 Difference]: Finished difference Result 1437 states and 4435 transitions. [2021-06-05 14:04:08,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:04:08,310 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:04:08,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:08,312 INFO L225 Difference]: With dead ends: 1437 [2021-06-05 14:04:08,312 INFO L226 Difference]: Without dead ends: 1427 [2021-06-05 14:04:08,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 523.8ms TimeCoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:04:08,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2021-06-05 14:04:08,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 1266. [2021-06-05 14:04:08,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 3.205533596837945) internal successors, (4055), 1265 states have internal predecessors, (4055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:08,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 4055 transitions. [2021-06-05 14:04:08,326 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 4055 transitions. Word has length 19 [2021-06-05 14:04:08,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:08,326 INFO L482 AbstractCegarLoop]: Abstraction has 1266 states and 4055 transitions. [2021-06-05 14:04:08,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:08,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 4055 transitions. [2021-06-05 14:04:08,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:08,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:08,327 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:08,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13472,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:08,528 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:08,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:08,528 INFO L82 PathProgramCache]: Analyzing trace with hash 2114567931, now seen corresponding path program 178 times [2021-06-05 14:04:08,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:08,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123759518] [2021-06-05 14:04:08,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:08,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:08,672 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:08,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:08,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123759518] [2021-06-05 14:04:08,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123759518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:08,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094540347] [2021-06-05 14:04:08,673 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 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 14:04:08,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:08,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:08,703 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:04:08,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:09,037 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:04:09,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:09,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:04:09,635 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 198 [2021-06-05 14:04:10,527 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 217 [2021-06-05 14:04:10,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:04:10,833 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:10,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:04:11,429 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 239 [2021-06-05 14:04:12,112 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:12,131 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:04:12,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:04:12,131 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:04:12,160 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:12,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094540347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:12,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:12,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:04:12,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039355807] [2021-06-05 14:04:12,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:04:12,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:12,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:04:12,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:04:12,161 INFO L87 Difference]: Start difference. First operand 1266 states and 4055 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:12,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:12,952 INFO L93 Difference]: Finished difference Result 1415 states and 4386 transitions. [2021-06-05 14:04:12,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 14:04:12,953 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:04:12,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:12,954 INFO L225 Difference]: With dead ends: 1415 [2021-06-05 14:04:12,954 INFO L226 Difference]: Without dead ends: 1403 [2021-06-05 14:04:12,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 696.4ms TimeCoverageRelationStatistics Valid=226, Invalid=1496, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:04:12,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2021-06-05 14:04:12,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1283. [2021-06-05 14:04:12,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 3.207488299531981) internal successors, (4112), 1282 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:12,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 4112 transitions. [2021-06-05 14:04:12,967 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 4112 transitions. Word has length 19 [2021-06-05 14:04:12,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:12,967 INFO L482 AbstractCegarLoop]: Abstraction has 1283 states and 4112 transitions. [2021-06-05 14:04:12,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:12,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 4112 transitions. [2021-06-05 14:04:12,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:12,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:12,969 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:13,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13775,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:13,170 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:13,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:13,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1223219970, now seen corresponding path program 179 times [2021-06-05 14:04:13,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:13,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666081111] [2021-06-05 14:04:13,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:13,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:13,211 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:13,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:13,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666081111] [2021-06-05 14:04:13,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666081111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:13,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237988265] [2021-06-05 14:04:13,211 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 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 14:04:13,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:04:13,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:13,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:13,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:13,266 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:13,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237988265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:13,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:13,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:04:13,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482600800] [2021-06-05 14:04:13,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:13,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:13,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:13,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:13,267 INFO L87 Difference]: Start difference. First operand 1283 states and 4112 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:13,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:13,337 INFO L93 Difference]: Finished difference Result 1610 states and 4775 transitions. [2021-06-05 14:04:13,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:04:13,338 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 14:04:13,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:13,339 INFO L225 Difference]: With dead ends: 1610 [2021-06-05 14:04:13,339 INFO L226 Difference]: Without dead ends: 1610 [2021-06-05 14:04:13,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:04:13,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2021-06-05 14:04:13,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1245. [2021-06-05 14:04:13,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1244 states have (on average 3.2017684887459805) internal successors, (3983), 1244 states have internal predecessors, (3983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:13,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 3983 transitions. [2021-06-05 14:04:13,353 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 3983 transitions. Word has length 19 [2021-06-05 14:04:13,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:13,353 INFO L482 AbstractCegarLoop]: Abstraction has 1245 states and 3983 transitions. [2021-06-05 14:04:13,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:13,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 3983 transitions. [2021-06-05 14:04:13,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:13,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:13,354 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:13,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14175,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:13,555 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:13,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:13,555 INFO L82 PathProgramCache]: Analyzing trace with hash -274674753, now seen corresponding path program 180 times [2021-06-05 14:04:13,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:13,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053918107] [2021-06-05 14:04:13,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:13,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:13,665 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:13,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:13,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053918107] [2021-06-05 14:04:13,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053918107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:13,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309256827] [2021-06-05 14:04:13,666 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 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 14:04:13,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:04:13,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:13,693 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:04:13,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:14,035 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:14,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:04:14,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:04:15,021 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:15,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:04:15,374 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:15,395 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:04:15,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:04:15,396 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:04:15,428 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:15,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309256827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:15,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:15,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:04:15,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75740136] [2021-06-05 14:04:15,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:04:15,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:15,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:04:15,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:04:15,430 INFO L87 Difference]: Start difference. First operand 1245 states and 3983 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:16,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:16,227 INFO L93 Difference]: Finished difference Result 1317 states and 4106 transitions. [2021-06-05 14:04:16,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:04:16,227 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:04:16,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:16,229 INFO L225 Difference]: With dead ends: 1317 [2021-06-05 14:04:16,230 INFO L226 Difference]: Without dead ends: 1307 [2021-06-05 14:04:16,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 777.5ms TimeCoverageRelationStatistics Valid=221, Invalid=1261, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 14:04:16,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2021-06-05 14:04:16,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1245. [2021-06-05 14:04:16,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1244 states have (on average 3.2017684887459805) internal successors, (3983), 1244 states have internal predecessors, (3983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:16,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 3983 transitions. [2021-06-05 14:04:16,248 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 3983 transitions. Word has length 19 [2021-06-05 14:04:16,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:16,248 INFO L482 AbstractCegarLoop]: Abstraction has 1245 states and 3983 transitions. [2021-06-05 14:04:16,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:16,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 3983 transitions. [2021-06-05 14:04:16,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:16,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:16,249 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:16,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14176,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:16,465 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:16,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:16,465 INFO L82 PathProgramCache]: Analyzing trace with hash -685364392, now seen corresponding path program 181 times [2021-06-05 14:04:16,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:16,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722130658] [2021-06-05 14:04:16,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:16,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:16,539 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:16,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:16,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722130658] [2021-06-05 14:04:16,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722130658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:16,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779223200] [2021-06-05 14:04:16,540 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 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 14:04:16,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:16,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:16,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:16,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779223200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:16,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:16,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:04:16,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156294963] [2021-06-05 14:04:16,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:16,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:16,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:16,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:16,608 INFO L87 Difference]: Start difference. First operand 1245 states and 3983 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:16,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:16,736 INFO L93 Difference]: Finished difference Result 2061 states and 6320 transitions. [2021-06-05 14:04:16,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:04:16,737 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 14:04:16,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:16,740 INFO L225 Difference]: With dead ends: 2061 [2021-06-05 14:04:16,740 INFO L226 Difference]: Without dead ends: 2061 [2021-06-05 14:04:16,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:04:16,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2021-06-05 14:04:16,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1804. [2021-06-05 14:04:16,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.2562396006655576) internal successors, (5871), 1803 states have internal predecessors, (5871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:16,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 5871 transitions. [2021-06-05 14:04:16,768 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 5871 transitions. Word has length 19 [2021-06-05 14:04:16,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:16,768 INFO L482 AbstractCegarLoop]: Abstraction has 1804 states and 5871 transitions. [2021-06-05 14:04:16,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:16,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 5871 transitions. [2021-06-05 14:04:16,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:16,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:16,770 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:16,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14384 [2021-06-05 14:04:16,992 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:16,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:16,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1326753925, now seen corresponding path program 182 times [2021-06-05 14:04:16,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:16,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475309678] [2021-06-05 14:04:16,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:16,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:17,124 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:17,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:17,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475309678] [2021-06-05 14:04:17,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475309678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:17,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863386585] [2021-06-05 14:04:17,125 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 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 14:04:17,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:17,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:17,161 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:04:17,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:17,620 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:04:17,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:17,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:04:18,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:04:18,958 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:18,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:04:20,028 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:20,049 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:04:20,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:04:20,050 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:04:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:20,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863386585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:20,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:20,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:04:20,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717804081] [2021-06-05 14:04:20,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:04:20,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:20,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:04:20,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:04:20,085 INFO L87 Difference]: Start difference. First operand 1804 states and 5871 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:21,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:21,057 INFO L93 Difference]: Finished difference Result 1866 states and 5973 transitions. [2021-06-05 14:04:21,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:04:21,057 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:04:21,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:21,060 INFO L225 Difference]: With dead ends: 1866 [2021-06-05 14:04:21,060 INFO L226 Difference]: Without dead ends: 1856 [2021-06-05 14:04:21,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 890.9ms TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 14:04:21,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2021-06-05 14:04:21,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1804. [2021-06-05 14:04:21,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.2562396006655576) internal successors, (5871), 1803 states have internal predecessors, (5871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:21,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 5871 transitions. [2021-06-05 14:04:21,087 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 5871 transitions. Word has length 19 [2021-06-05 14:04:21,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:21,087 INFO L482 AbstractCegarLoop]: Abstraction has 1804 states and 5871 transitions. [2021-06-05 14:04:21,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:21,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 5871 transitions. [2021-06-05 14:04:21,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:21,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:21,090 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:21,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14385,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:21,311 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:21,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:21,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1191710658, now seen corresponding path program 183 times [2021-06-05 14:04:21,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:21,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825919148] [2021-06-05 14:04:21,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:21,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:21,383 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:21,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:21,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825919148] [2021-06-05 14:04:21,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825919148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:21,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781307438] [2021-06-05 14:04:21,383 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 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 14:04:21,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:04:21,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:21,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:04:21,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:21,454 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:21,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781307438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:21,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:21,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:04:21,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582904635] [2021-06-05 14:04:21,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:04:21,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:21,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:04:21,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:04:21,455 INFO L87 Difference]: Start difference. First operand 1804 states and 5871 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:21,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:21,607 INFO L93 Difference]: Finished difference Result 2380 states and 7376 transitions. [2021-06-05 14:04:21,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:04:21,607 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 14:04:21,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:21,610 INFO L225 Difference]: With dead ends: 2380 [2021-06-05 14:04:21,610 INFO L226 Difference]: Without dead ends: 2380 [2021-06-05 14:04:21,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 117.6ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:04:21,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-06-05 14:04:21,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 2051. [2021-06-05 14:04:21,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.2712195121951217) internal successors, (6706), 2050 states have internal predecessors, (6706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:21,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6706 transitions. [2021-06-05 14:04:21,635 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6706 transitions. Word has length 19 [2021-06-05 14:04:21,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:21,635 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 6706 transitions. [2021-06-05 14:04:21,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:21,635 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6706 transitions. [2021-06-05 14:04:21,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:21,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:21,637 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:21,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14698 [2021-06-05 14:04:21,838 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:21,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:21,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1038408603, now seen corresponding path program 184 times [2021-06-05 14:04:21,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:21,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766046361] [2021-06-05 14:04:21,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:21,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:21,935 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:04:21,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:21,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766046361] [2021-06-05 14:04:21,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766046361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:21,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471741656] [2021-06-05 14:04:21,935 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 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 14:04:21,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:21,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:21,997 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:04:21,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:22,381 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:22,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:04:23,388 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 403 DAG size of output: 223 [2021-06-05 14:04:23,520 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 240 [2021-06-05 14:04:23,653 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 240 [2021-06-05 14:04:23,797 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 432 DAG size of output: 244 [2021-06-05 14:04:24,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:24,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:24,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:04:24,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:04:24,259 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:24,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471741656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:24,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:24,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-05 14:04:24,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620608332] [2021-06-05 14:04:24,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:04:24,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:24,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:04:24,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:04:24,270 INFO L87 Difference]: Start difference. First operand 2051 states and 6706 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:04:24,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:24,597 INFO L93 Difference]: Finished difference Result 2076 states and 6747 transitions. [2021-06-05 14:04:24,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:04:24,598 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:04:24,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:24,601 INFO L225 Difference]: With dead ends: 2076 [2021-06-05 14:04:24,601 INFO L226 Difference]: Without dead ends: 2063 [2021-06-05 14:04:24,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 364.6ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:04:24,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-06-05 14:04:24,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 2051. [2021-06-05 14:04:24,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.270243902439024) internal successors, (6704), 2050 states have internal predecessors, (6704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:24,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6704 transitions. [2021-06-05 14:04:24,661 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6704 transitions. Word has length 19 [2021-06-05 14:04:24,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:24,661 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 6704 transitions. [2021-06-05 14:04:24,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:04:24,661 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6704 transitions. [2021-06-05 14:04:24,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:24,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:24,664 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:24,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14699 [2021-06-05 14:04:24,879 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:24,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:24,880 INFO L82 PathProgramCache]: Analyzing trace with hash -186075179, now seen corresponding path program 185 times [2021-06-05 14:04:24,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:24,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967960505] [2021-06-05 14:04:24,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:24,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:24,986 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:04:24,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:24,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967960505] [2021-06-05 14:04:24,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967960505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:24,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208306092] [2021-06-05 14:04:24,987 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 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 14:04:25,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:04:25,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:25,022 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:04:25,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:25,387 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:25,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:04:26,559 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 211 [2021-06-05 14:04:26,662 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 215 [2021-06-05 14:04:26,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:26,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:26,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:04:26,887 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:04:26,892 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:26,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208306092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:26,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:26,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-05 14:04:26,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082546835] [2021-06-05 14:04:26,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:04:26,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:26,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:04:26,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:04:26,893 INFO L87 Difference]: Start difference. First operand 2051 states and 6704 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:04:27,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:27,221 INFO L93 Difference]: Finished difference Result 2076 states and 6752 transitions. [2021-06-05 14:04:27,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:04:27,221 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:04:27,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:27,224 INFO L225 Difference]: With dead ends: 2076 [2021-06-05 14:04:27,224 INFO L226 Difference]: Without dead ends: 2067 [2021-06-05 14:04:27,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 423.2ms TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:04:27,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2021-06-05 14:04:27,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 2053. [2021-06-05 14:04:27,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2053 states, 2052 states have (on average 3.269980506822612) internal successors, (6710), 2052 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:27,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 6710 transitions. [2021-06-05 14:04:27,257 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 6710 transitions. Word has length 19 [2021-06-05 14:04:27,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:27,257 INFO L482 AbstractCegarLoop]: Abstraction has 2053 states and 6710 transitions. [2021-06-05 14:04:27,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:04:27,257 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 6710 transitions. [2021-06-05 14:04:27,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:27,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:27,259 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:27,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14956,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:27,473 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:27,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:27,473 INFO L82 PathProgramCache]: Analyzing trace with hash 557508181, now seen corresponding path program 186 times [2021-06-05 14:04:27,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:27,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615573949] [2021-06-05 14:04:27,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:27,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:27,604 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:04:27,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:27,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615573949] [2021-06-05 14:04:27,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615573949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:27,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320494876] [2021-06-05 14:04:27,604 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 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 14:04:27,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:04:27,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:27,636 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:04:27,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:28,000 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:04:28,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:28,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:04:28,738 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 292 [2021-06-05 14:04:28,904 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 292 [2021-06-05 14:04:29,057 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 305 [2021-06-05 14:04:29,272 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 425 [2021-06-05 14:04:30,604 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 222 [2021-06-05 14:04:30,840 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 357 [2021-06-05 14:04:31,800 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 680 DAG size of output: 451 [2021-06-05 14:04:32,233 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 835 DAG size of output: 577 [2021-06-05 14:04:32,645 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 835 DAG size of output: 577 [2021-06-05 14:04:33,120 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 840 DAG size of output: 582 [2021-06-05 14:04:33,626 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 584 DAG size of output: 698 [2021-06-05 14:04:33,976 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 511 [2021-06-05 14:04:34,656 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 315 [2021-06-05 14:04:35,090 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 259 [2021-06-05 14:04:35,199 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 259 [2021-06-05 14:04:35,346 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 262 [2021-06-05 14:04:35,475 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 261 [2021-06-05 14:04:35,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:04:35,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:35,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:04:36,349 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 194 [2021-06-05 14:04:36,975 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:37,010 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:04:37,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:04:37,011 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:04:37,048 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:37,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320494876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:37,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:37,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-05 14:04:37,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917238800] [2021-06-05 14:04:37,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:04:37,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:37,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:04:37,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:04:37,049 INFO L87 Difference]: Start difference. First operand 2053 states and 6710 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:04:37,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:37,540 INFO L93 Difference]: Finished difference Result 2108 states and 6809 transitions. [2021-06-05 14:04:37,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:04:37,541 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:04:37,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:37,544 INFO L225 Difference]: With dead ends: 2108 [2021-06-05 14:04:37,544 INFO L226 Difference]: Without dead ends: 2098 [2021-06-05 14:04:37,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 403.4ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:04:37,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2021-06-05 14:04:37,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 2052. [2021-06-05 14:04:37,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 2051 states have (on average 3.270112140419308) internal successors, (6707), 2051 states have internal predecessors, (6707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:37,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 6707 transitions. [2021-06-05 14:04:37,571 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 6707 transitions. Word has length 19 [2021-06-05 14:04:37,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:37,571 INFO L482 AbstractCegarLoop]: Abstraction has 2052 states and 6707 transitions. [2021-06-05 14:04:37,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 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 14:04:37,572 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 6707 transitions. [2021-06-05 14:04:37,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:37,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:37,573 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:37,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15124,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:37,774 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:37,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:37,774 INFO L82 PathProgramCache]: Analyzing trace with hash -5033861, now seen corresponding path program 187 times [2021-06-05 14:04:37,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:37,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647043305] [2021-06-05 14:04:37,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:37,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:37,893 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:37,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:37,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647043305] [2021-06-05 14:04:37,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647043305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:37,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845030603] [2021-06-05 14:04:37,894 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 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 14:04:37,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:37,924 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:04:37,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:38,313 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:04:38,314 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:38,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:04:40,084 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 199 [2021-06-05 14:04:40,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:04:40,320 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:40,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:04:40,700 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:40,719 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:04:40,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:04:40,719 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:04:40,746 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:40,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845030603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:40,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:40,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:04:40,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39253693] [2021-06-05 14:04:40,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:04:40,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:40,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:04:40,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:04:40,747 INFO L87 Difference]: Start difference. First operand 2052 states and 6707 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:41,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:41,348 INFO L93 Difference]: Finished difference Result 2150 states and 6903 transitions. [2021-06-05 14:04:41,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:04:41,348 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 14:04:41,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:41,351 INFO L225 Difference]: With dead ends: 2150 [2021-06-05 14:04:41,351 INFO L226 Difference]: Without dead ends: 2140 [2021-06-05 14:04:41,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 610.9ms TimeCoverageRelationStatistics Valid=199, Invalid=1207, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:04:41,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2021-06-05 14:04:41,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2066. [2021-06-05 14:04:41,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 2065 states have (on average 3.2677966101694915) internal successors, (6748), 2065 states have internal predecessors, (6748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:41,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 6748 transitions. [2021-06-05 14:04:41,373 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 6748 transitions. Word has length 19 [2021-06-05 14:04:41,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:41,373 INFO L482 AbstractCegarLoop]: Abstraction has 2066 states and 6748 transitions. [2021-06-05 14:04:41,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:41,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 6748 transitions. [2021-06-05 14:04:41,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:41,374 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:41,374 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:41,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16111 [2021-06-05 14:04:41,575 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:41,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:41,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1900690751, now seen corresponding path program 188 times [2021-06-05 14:04:41,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:41,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365072364] [2021-06-05 14:04:41,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:41,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:41,678 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:04:41,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:41,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365072364] [2021-06-05 14:04:41,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365072364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:41,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670880419] [2021-06-05 14:04:41,679 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 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 14:04:41,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:41,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:41,704 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:04:41,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:42,036 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:42,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:04:42,765 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 267 [2021-06-05 14:04:42,897 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 281 [2021-06-05 14:04:43,578 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 281 [2021-06-05 14:04:43,720 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 281 [2021-06-05 14:04:43,879 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 286 [2021-06-05 14:04:44,120 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 299 [2021-06-05 14:04:44,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:04:44,754 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:44,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:04:45,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:45,120 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:04:45,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:04:45,121 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:04:45,149 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:45,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670880419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:45,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:45,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:04:45,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771483909] [2021-06-05 14:04:45,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:04:45,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:45,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:04:45,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:04:45,150 INFO L87 Difference]: Start difference. First operand 2066 states and 6748 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:45,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:45,761 INFO L93 Difference]: Finished difference Result 2201 states and 7027 transitions. [2021-06-05 14:04:45,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:04:45,761 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 14:04:45,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:45,764 INFO L225 Difference]: With dead ends: 2201 [2021-06-05 14:04:45,764 INFO L226 Difference]: Without dead ends: 2171 [2021-06-05 14:04:45,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 613.7ms TimeCoverageRelationStatistics Valid=202, Invalid=1204, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:04:45,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-06-05 14:04:45,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2055. [2021-06-05 14:04:45,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 3.2658227848101267) internal successors, (6708), 2054 states have internal predecessors, (6708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:45,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 6708 transitions. [2021-06-05 14:04:45,786 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 6708 transitions. Word has length 19 [2021-06-05 14:04:45,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:45,786 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 6708 transitions. [2021-06-05 14:04:45,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:45,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 6708 transitions. [2021-06-05 14:04:45,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:45,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:45,788 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:45,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16439 [2021-06-05 14:04:45,989 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:45,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:45,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1478101077, now seen corresponding path program 189 times [2021-06-05 14:04:45,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:45,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943393660] [2021-06-05 14:04:45,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:45,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:46,110 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:46,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:46,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943393660] [2021-06-05 14:04:46,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943393660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:46,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142751514] [2021-06-05 14:04:46,111 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 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 14:04:46,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:04:46,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:46,146 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:04:46,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:46,478 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:04:46,479 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:46,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:04:47,591 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 179 [2021-06-05 14:04:47,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:04:48,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:48,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:04:49,085 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 231 [2021-06-05 14:04:49,222 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:49,240 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:04:49,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:04:49,241 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:04:49,271 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:49,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142751514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:49,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:49,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:04:49,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391697502] [2021-06-05 14:04:49,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:04:49,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:49,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:04:49,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:04:49,272 INFO L87 Difference]: Start difference. First operand 2055 states and 6708 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:49,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:49,896 INFO L93 Difference]: Finished difference Result 2182 states and 6988 transitions. [2021-06-05 14:04:49,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:04:49,896 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:04:49,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:49,898 INFO L225 Difference]: With dead ends: 2182 [2021-06-05 14:04:49,898 INFO L226 Difference]: Without dead ends: 2172 [2021-06-05 14:04:49,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 643.2ms TimeCoverageRelationStatistics Valid=221, Invalid=1419, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 14:04:49,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-05 14:04:49,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 2074. [2021-06-05 14:04:49,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2074 states, 2073 states have (on average 3.263868789194404) internal successors, (6766), 2073 states have internal predecessors, (6766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:49,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 6766 transitions. [2021-06-05 14:04:49,920 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 6766 transitions. Word has length 19 [2021-06-05 14:04:49,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:49,921 INFO L482 AbstractCegarLoop]: Abstraction has 2074 states and 6766 transitions. [2021-06-05 14:04:49,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:49,921 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 6766 transitions. [2021-06-05 14:04:49,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:49,922 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:49,922 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:50,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16811,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:50,123 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:50,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:50,123 INFO L82 PathProgramCache]: Analyzing trace with hash -911141607, now seen corresponding path program 190 times [2021-06-05 14:04:50,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:50,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647107402] [2021-06-05 14:04:50,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:50,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:50,226 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:50,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:50,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647107402] [2021-06-05 14:04:50,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647107402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:50,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977920728] [2021-06-05 14:04:50,226 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 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 14:04:50,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:50,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:50,252 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:04:50,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:50,615 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:04:50,616 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:50,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:04:52,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:04:52,234 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:52,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:04:52,990 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:53,008 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:04:53,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:04:53,009 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:04:53,037 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:53,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977920728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:53,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:53,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:04:53,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101382038] [2021-06-05 14:04:53,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:04:53,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:53,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:04:53,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:04:53,038 INFO L87 Difference]: Start difference. First operand 2074 states and 6766 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:53,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:53,760 INFO L93 Difference]: Finished difference Result 2241 states and 7161 transitions. [2021-06-05 14:04:53,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:04:53,761 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:04:53,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:53,763 INFO L225 Difference]: With dead ends: 2241 [2021-06-05 14:04:53,763 INFO L226 Difference]: Without dead ends: 2215 [2021-06-05 14:04:53,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 697.2ms TimeCoverageRelationStatistics Valid=230, Invalid=1410, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 14:04:53,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2021-06-05 14:04:53,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2055. [2021-06-05 14:04:53,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 3.2633885102239533) internal successors, (6703), 2054 states have internal predecessors, (6703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:53,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 6703 transitions. [2021-06-05 14:04:53,787 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 6703 transitions. Word has length 19 [2021-06-05 14:04:53,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:53,787 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 6703 transitions. [2021-06-05 14:04:53,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:53,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 6703 transitions. [2021-06-05 14:04:53,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:53,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:53,789 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:53,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17226,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:53,989 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:53,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:53,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1963220779, now seen corresponding path program 191 times [2021-06-05 14:04:53,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:53,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150622707] [2021-06-05 14:04:53,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:54,091 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:54,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:54,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150622707] [2021-06-05 14:04:54,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150622707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:54,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65542979] [2021-06-05 14:04:54,092 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 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 14:04:54,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:04:54,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:54,117 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:04:54,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:54,473 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:04:54,474 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:54,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:04:56,059 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 279 [2021-06-05 14:04:56,225 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 279 [2021-06-05 14:04:56,482 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 267 [2021-06-05 14:04:57,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:04:57,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:57,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:04:57,416 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:57,436 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:04:57,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:04:57,437 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:04:57,467 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:57,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65542979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:57,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:57,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:04:57,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110044229] [2021-06-05 14:04:57,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:04:57,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:57,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:04:57,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:04:57,468 INFO L87 Difference]: Start difference. First operand 2055 states and 6703 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:58,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:58,102 INFO L93 Difference]: Finished difference Result 2116 states and 6803 transitions. [2021-06-05 14:04:58,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:04:58,103 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:04:58,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:58,105 INFO L225 Difference]: With dead ends: 2116 [2021-06-05 14:04:58,105 INFO L226 Difference]: Without dead ends: 2106 [2021-06-05 14:04:58,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 731.4ms TimeCoverageRelationStatistics Valid=233, Invalid=1327, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:04:58,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-06-05 14:04:58,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2055. [2021-06-05 14:04:58,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 3.2633885102239533) internal successors, (6703), 2054 states have internal predecessors, (6703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:58,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 6703 transitions. [2021-06-05 14:04:58,127 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 6703 transitions. Word has length 19 [2021-06-05 14:04:58,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:58,127 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 6703 transitions. [2021-06-05 14:04:58,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:04:58,127 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 6703 transitions. [2021-06-05 14:04:58,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:04:58,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:58,128 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:58,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17573 [2021-06-05 14:04:58,329 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:58,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:58,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1999747909, now seen corresponding path program 192 times [2021-06-05 14:04:58,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:58,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826690838] [2021-06-05 14:04:58,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:58,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:58,475 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:04:58,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:58,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826690838] [2021-06-05 14:04:58,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826690838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:58,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550777424] [2021-06-05 14:04:58,476 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 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 14:04:58,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:04:58,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:58,501 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:04:58,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:58,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:58,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:04:59,425 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 297 [2021-06-05 14:05:00,447 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 281 [2021-06-05 14:05:00,579 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 281 [2021-06-05 14:05:00,746 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 285 [2021-06-05 14:05:00,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:05:00,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:00,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:05:00,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:05:00,943 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:00,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550777424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:00,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:00,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:05:00,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979361323] [2021-06-05 14:05:00,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:05:00,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:00,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:05:00,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:05:00,944 INFO L87 Difference]: Start difference. First operand 2055 states and 6703 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:01,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:01,369 INFO L93 Difference]: Finished difference Result 2086 states and 6761 transitions. [2021-06-05 14:05:01,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:05:01,369 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:05:01,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:01,371 INFO L225 Difference]: With dead ends: 2086 [2021-06-05 14:05:01,371 INFO L226 Difference]: Without dead ends: 2075 [2021-06-05 14:05:01,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 495.7ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:05:01,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2021-06-05 14:05:01,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 2055. [2021-06-05 14:05:01,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 3.2599805258033108) internal successors, (6696), 2054 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:01,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 6696 transitions. [2021-06-05 14:05:01,393 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 6696 transitions. Word has length 19 [2021-06-05 14:05:01,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:01,393 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 6696 transitions. [2021-06-05 14:05:01,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:01,393 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 6696 transitions. [2021-06-05 14:05:01,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:01,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:01,394 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:01,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17916,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:01,595 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:01,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:01,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1256164549, now seen corresponding path program 193 times [2021-06-05 14:05:01,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:01,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522510308] [2021-06-05 14:05:01,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:01,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:01,703 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:05:01,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:01,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522510308] [2021-06-05 14:05:01,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522510308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:01,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894462816] [2021-06-05 14:05:01,704 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 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 14:05:01,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:01,727 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:05:01,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:02,050 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:05:02,051 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:02,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:05:02,719 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 209 [2021-06-05 14:05:02,846 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 220 [2021-06-05 14:05:03,111 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 232 [2021-06-05 14:05:03,950 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 180 [2021-06-05 14:05:04,068 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 191 [2021-06-05 14:05:04,677 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 183 [2021-06-05 14:05:04,882 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 283 [2021-06-05 14:05:05,202 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 290 [2021-06-05 14:05:05,524 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 555 DAG size of output: 397 [2021-06-05 14:05:05,928 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 555 DAG size of output: 397 [2021-06-05 14:05:06,300 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 404 [2021-06-05 14:05:06,640 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 402 [2021-06-05 14:05:07,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:05:07,693 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:07,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:05:08,912 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 136 [2021-06-05 14:05:09,104 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:05:09,123 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:05:09,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:05:09,124 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:05:09,155 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:09,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894462816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:09,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:09,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:05:09,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338612191] [2021-06-05 14:05:09,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:05:09,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:09,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:05:09,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:05:09,156 INFO L87 Difference]: Start difference. First operand 2055 states and 6696 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:09,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:09,993 INFO L93 Difference]: Finished difference Result 2182 states and 7001 transitions. [2021-06-05 14:05:09,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:05:09,994 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:05:09,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:09,997 INFO L225 Difference]: With dead ends: 2182 [2021-06-05 14:05:09,997 INFO L226 Difference]: Without dead ends: 2172 [2021-06-05 14:05:09,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 509.2ms TimeCoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:05:09,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-05 14:05:10,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 2055. [2021-06-05 14:05:10,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 3.2599805258033108) internal successors, (6696), 2054 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:10,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 6696 transitions. [2021-06-05 14:05:10,020 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 6696 transitions. Word has length 19 [2021-06-05 14:05:10,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:10,020 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 6696 transitions. [2021-06-05 14:05:10,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:10,020 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 6696 transitions. [2021-06-05 14:05:10,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:10,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:10,022 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:10,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18314 [2021-06-05 14:05:10,222 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:10,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:10,223 INFO L82 PathProgramCache]: Analyzing trace with hash -405020417, now seen corresponding path program 194 times [2021-06-05 14:05:10,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:10,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081792207] [2021-06-05 14:05:10,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:10,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:10,321 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:10,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:10,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081792207] [2021-06-05 14:05:10,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081792207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:10,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995694218] [2021-06-05 14:05:10,321 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 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 14:05:10,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:05:10,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:10,346 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:05:10,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:10,675 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:10,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:05:12,031 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 220 [2021-06-05 14:05:12,152 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 220 [2021-06-05 14:05:12,283 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 225 [2021-06-05 14:05:12,442 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 237 [2021-06-05 14:05:12,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:05:12,754 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:12,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:05:13,140 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:05:13,158 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:05:13,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:05:13,159 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:05:13,187 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:13,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995694218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:13,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:13,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:05:13,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443074535] [2021-06-05 14:05:13,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:05:13,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:13,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:05:13,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:05:13,187 INFO L87 Difference]: Start difference. First operand 2055 states and 6696 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:14,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:14,090 INFO L93 Difference]: Finished difference Result 2292 states and 7285 transitions. [2021-06-05 14:05:14,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 14:05:14,090 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:05:14,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:14,093 INFO L225 Difference]: With dead ends: 2292 [2021-06-05 14:05:14,093 INFO L226 Difference]: Without dead ends: 2280 [2021-06-05 14:05:14,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 637.2ms TimeCoverageRelationStatistics Valid=214, Invalid=1678, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 14:05:14,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2021-06-05 14:05:14,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 2076. [2021-06-05 14:05:14,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2076 states, 2075 states have (on average 3.261686746987952) internal successors, (6768), 2075 states have internal predecessors, (6768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:14,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 6768 transitions. [2021-06-05 14:05:14,117 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 6768 transitions. Word has length 19 [2021-06-05 14:05:14,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:14,117 INFO L482 AbstractCegarLoop]: Abstraction has 2076 states and 6768 transitions. [2021-06-05 14:05:14,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:14,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 6768 transitions. [2021-06-05 14:05:14,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:14,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:14,119 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:14,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18885,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:14,320 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:14,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:14,320 INFO L82 PathProgramCache]: Analyzing trace with hash 210643899, now seen corresponding path program 195 times [2021-06-05 14:05:14,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:14,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292289401] [2021-06-05 14:05:14,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:14,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:14,477 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:14,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:14,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292289401] [2021-06-05 14:05:14,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292289401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:14,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729666364] [2021-06-05 14:05:14,478 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 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 14:05:14,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:05:14,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:14,505 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:05:14,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:14,862 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:05:14,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:14,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:05:16,190 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 215 [2021-06-05 14:05:16,341 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 265 [2021-06-05 14:05:16,492 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 219 [2021-06-05 14:05:17,563 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 491 DAG size of output: 259 [2021-06-05 14:05:18,783 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 845 DAG size of output: 389 [2021-06-05 14:05:18,995 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 845 DAG size of output: 389 [2021-06-05 14:05:19,235 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 848 DAG size of output: 392 [2021-06-05 14:05:19,560 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 517 [2021-06-05 14:05:20,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:05:20,134 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:20,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:05:20,618 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:05:20,637 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:05:20,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:05:20,638 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:05:20,673 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:20,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729666364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:20,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:20,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:05:20,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510617056] [2021-06-05 14:05:20,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:05:20,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:20,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:05:20,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:05:20,674 INFO L87 Difference]: Start difference. First operand 2076 states and 6768 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:21,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:21,924 INFO L93 Difference]: Finished difference Result 2278 states and 7226 transitions. [2021-06-05 14:05:21,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 14:05:21,924 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:05:21,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:21,927 INFO L225 Difference]: With dead ends: 2278 [2021-06-05 14:05:21,927 INFO L226 Difference]: Without dead ends: 2266 [2021-06-05 14:05:21,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 949.3ms TimeCoverageRelationStatistics Valid=321, Invalid=2229, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 14:05:21,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2266 states. [2021-06-05 14:05:21,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2266 to 2093. [2021-06-05 14:05:21,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2093 states, 2092 states have (on average 3.2633843212237093) internal successors, (6827), 2092 states have internal predecessors, (6827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:21,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2093 states to 2093 states and 6827 transitions. [2021-06-05 14:05:21,958 INFO L78 Accepts]: Start accepts. Automaton has 2093 states and 6827 transitions. Word has length 19 [2021-06-05 14:05:21,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:21,959 INFO L482 AbstractCegarLoop]: Abstraction has 2093 states and 6827 transitions. [2021-06-05 14:05:21,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:21,959 INFO L276 IsEmpty]: Start isEmpty. Operand 2093 states and 6827 transitions. [2021-06-05 14:05:21,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:21,961 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:21,961 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:22,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19223 [2021-06-05 14:05:22,173 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:22,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:22,173 INFO L82 PathProgramCache]: Analyzing trace with hash 2116368511, now seen corresponding path program 196 times [2021-06-05 14:05:22,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:22,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231543051] [2021-06-05 14:05:22,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:22,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:22,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:22,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231543051] [2021-06-05 14:05:22,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231543051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:22,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310270757] [2021-06-05 14:05:22,424 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 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 14:05:22,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:05:22,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:22,457 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:05:22,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:22,849 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:05:22,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:22,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:05:24,077 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 194 [2021-06-05 14:05:24,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:05:24,489 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:24,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:05:24,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:05:24,876 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:05:24,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:05:24,877 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:05:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:24,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310270757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:24,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:24,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:05:24,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573318855] [2021-06-05 14:05:24,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:05:24,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:24,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:05:24,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:05:24,912 INFO L87 Difference]: Start difference. First operand 2093 states and 6827 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:26,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:26,308 INFO L93 Difference]: Finished difference Result 2437 states and 7752 transitions. [2021-06-05 14:05:26,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 14:05:26,308 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:05:26,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:26,312 INFO L225 Difference]: With dead ends: 2437 [2021-06-05 14:05:26,312 INFO L226 Difference]: Without dead ends: 2423 [2021-06-05 14:05:26,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1164.1ms TimeCoverageRelationStatistics Valid=331, Invalid=2021, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 14:05:26,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-06-05 14:05:26,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 2022. [2021-06-05 14:05:26,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2022 states, 2021 states have (on average 3.2300841167738743) internal successors, (6528), 2021 states have internal predecessors, (6528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:26,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 6528 transitions. [2021-06-05 14:05:26,360 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 6528 transitions. Word has length 19 [2021-06-05 14:05:26,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:26,360 INFO L482 AbstractCegarLoop]: Abstraction has 2022 states and 6528 transitions. [2021-06-05 14:05:26,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:26,360 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 6528 transitions. [2021-06-05 14:05:26,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:26,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:26,362 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:26,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19814,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:26,563 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:26,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:26,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1705678872, now seen corresponding path program 197 times [2021-06-05 14:05:26,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:26,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745597663] [2021-06-05 14:05:26,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:26,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:26,616 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:26,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:26,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745597663] [2021-06-05 14:05:26,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745597663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:26,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68984836] [2021-06-05 14:05:26,616 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 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 14:05:26,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:05:26,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:26,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:05:26,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:26,688 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:26,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68984836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:26,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:26,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:05:26,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495689846] [2021-06-05 14:05:26,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:05:26,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:26,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:05:26,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:05:26,689 INFO L87 Difference]: Start difference. First operand 2022 states and 6528 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:26,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:26,795 INFO L93 Difference]: Finished difference Result 2332 states and 7081 transitions. [2021-06-05 14:05:26,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:05:26,795 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 14:05:26,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:26,798 INFO L225 Difference]: With dead ends: 2332 [2021-06-05 14:05:26,798 INFO L226 Difference]: Without dead ends: 2332 [2021-06-05 14:05:26,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:05:26,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2021-06-05 14:05:26,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 1261. [2021-06-05 14:05:26,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 3.1634920634920634) internal successors, (3986), 1260 states have internal predecessors, (3986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:26,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 3986 transitions. [2021-06-05 14:05:26,825 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 3986 transitions. Word has length 19 [2021-06-05 14:05:26,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:26,825 INFO L482 AbstractCegarLoop]: Abstraction has 1261 states and 3986 transitions. [2021-06-05 14:05:26,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:26,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 3986 transitions. [2021-06-05 14:05:26,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:26,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:26,826 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:27,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20067 [2021-06-05 14:05:27,033 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:27,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:27,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1064289339, now seen corresponding path program 198 times [2021-06-05 14:05:27,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:27,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253365628] [2021-06-05 14:05:27,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:27,206 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:27,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:27,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253365628] [2021-06-05 14:05:27,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253365628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:27,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386878322] [2021-06-05 14:05:27,207 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 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 14:05:27,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:05:27,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:27,239 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:05:27,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:27,739 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:05:27,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:27,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:05:28,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:05:29,071 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:29,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:05:29,694 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:05:29,715 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:05:29,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:05:29,716 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:05:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:29,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386878322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:29,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:29,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:05:29,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257303877] [2021-06-05 14:05:29,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:05:29,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:29,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:05:29,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:05:29,751 INFO L87 Difference]: Start difference. First operand 1261 states and 3986 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:30,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:30,643 INFO L93 Difference]: Finished difference Result 1351 states and 4144 transitions. [2021-06-05 14:05:30,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:05:30,644 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:05:30,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:30,645 INFO L225 Difference]: With dead ends: 1351 [2021-06-05 14:05:30,645 INFO L226 Difference]: Without dead ends: 1341 [2021-06-05 14:05:30,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1038.7ms TimeCoverageRelationStatistics Valid=263, Invalid=1543, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 14:05:30,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-06-05 14:05:30,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1261. [2021-06-05 14:05:30,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 3.1634920634920634) internal successors, (3986), 1260 states have internal predecessors, (3986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:30,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 3986 transitions. [2021-06-05 14:05:30,658 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 3986 transitions. Word has length 19 [2021-06-05 14:05:30,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:30,658 INFO L482 AbstractCegarLoop]: Abstraction has 1261 states and 3986 transitions. [2021-06-05 14:05:30,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:30,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 3986 transitions. [2021-06-05 14:05:30,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:30,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:30,659 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:30,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20068 [2021-06-05 14:05:30,860 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:30,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:30,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1199332606, now seen corresponding path program 199 times [2021-06-05 14:05:30,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:30,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505111078] [2021-06-05 14:05:30,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:30,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:30,912 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:30,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:30,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505111078] [2021-06-05 14:05:30,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505111078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:30,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398931730] [2021-06-05 14:05:30,913 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 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 14:05:30,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:30,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:05:30,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:30,989 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:30,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398931730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:30,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:30,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:05:30,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812605916] [2021-06-05 14:05:30,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:05:30,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:30,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:05:30,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:05:30,990 INFO L87 Difference]: Start difference. First operand 1261 states and 3986 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:31,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:31,145 INFO L93 Difference]: Finished difference Result 1892 states and 5707 transitions. [2021-06-05 14:05:31,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:05:31,145 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 14:05:31,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:31,147 INFO L225 Difference]: With dead ends: 1892 [2021-06-05 14:05:31,147 INFO L226 Difference]: Without dead ends: 1892 [2021-06-05 14:05:31,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 125.1ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:05:31,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1892 states. [2021-06-05 14:05:31,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1892 to 1496. [2021-06-05 14:05:31,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 3.181939799331104) internal successors, (4757), 1495 states have internal predecessors, (4757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:31,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 4757 transitions. [2021-06-05 14:05:31,168 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 4757 transitions. Word has length 19 [2021-06-05 14:05:31,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:31,168 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 4757 transitions. [2021-06-05 14:05:31,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:31,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 4757 transitions. [2021-06-05 14:05:31,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:31,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:31,170 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:31,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20335 [2021-06-05 14:05:31,382 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:31,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:31,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1485393921, now seen corresponding path program 200 times [2021-06-05 14:05:31,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:31,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040293853] [2021-06-05 14:05:31,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:31,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:31,647 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:31,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:31,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040293853] [2021-06-05 14:05:31,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040293853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:31,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639893086] [2021-06-05 14:05:31,647 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 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 14:05:31,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:05:31,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:31,679 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:05:31,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:32,279 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:05:32,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:32,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:05:33,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:05:33,696 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:33,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:05:34,420 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:05:34,441 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:05:34,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:05:34,442 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:05:34,476 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:34,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639893086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:34,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:34,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:05:34,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880212016] [2021-06-05 14:05:34,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:05:34,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:34,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:05:34,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:05:34,478 INFO L87 Difference]: Start difference. First operand 1496 states and 4757 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:35,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:35,541 INFO L93 Difference]: Finished difference Result 1563 states and 4870 transitions. [2021-06-05 14:05:35,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:05:35,542 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:05:35,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:35,544 INFO L225 Difference]: With dead ends: 1563 [2021-06-05 14:05:35,545 INFO L226 Difference]: Without dead ends: 1553 [2021-06-05 14:05:35,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1246.7ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 14:05:35,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2021-06-05 14:05:35,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 1496. [2021-06-05 14:05:35,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 3.181939799331104) internal successors, (4757), 1495 states have internal predecessors, (4757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:35,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 4757 transitions. [2021-06-05 14:05:35,569 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 4757 transitions. Word has length 19 [2021-06-05 14:05:35,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:35,569 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 4757 transitions. [2021-06-05 14:05:35,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:35,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 4757 transitions. [2021-06-05 14:05:35,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:35,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:35,571 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:35,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20336 [2021-06-05 14:05:35,795 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:35,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:35,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1612499752, now seen corresponding path program 201 times [2021-06-05 14:05:35,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:35,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849534173] [2021-06-05 14:05:35,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:35,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:35,863 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:35,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:35,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849534173] [2021-06-05 14:05:35,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849534173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:35,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899746959] [2021-06-05 14:05:35,863 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 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 14:05:35,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:05:35,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:35,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:05:35,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:35,935 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:35,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899746959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:35,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:35,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:05:35,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190410884] [2021-06-05 14:05:35,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:05:35,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:35,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:05:35,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:05:35,936 INFO L87 Difference]: Start difference. First operand 1496 states and 4757 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:36,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:36,551 INFO L93 Difference]: Finished difference Result 1980 states and 5974 transitions. [2021-06-05 14:05:36,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:05:36,552 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 14:05:36,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:36,554 INFO L225 Difference]: With dead ends: 1980 [2021-06-05 14:05:36,554 INFO L226 Difference]: Without dead ends: 1980 [2021-06-05 14:05:36,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 274.9ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:05:36,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2021-06-05 14:05:36,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1650. [2021-06-05 14:05:36,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1649 states have (on average 3.187386294724075) internal successors, (5256), 1649 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:36,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 5256 transitions. [2021-06-05 14:05:36,578 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 5256 transitions. Word has length 19 [2021-06-05 14:05:36,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:36,578 INFO L482 AbstractCegarLoop]: Abstraction has 1650 states and 5256 transitions. [2021-06-05 14:05:36,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:36,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 5256 transitions. [2021-06-05 14:05:36,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:36,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:36,580 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:36,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20582 [2021-06-05 14:05:36,794 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:36,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:36,794 INFO L82 PathProgramCache]: Analyzing trace with hash 705955403, now seen corresponding path program 202 times [2021-06-05 14:05:36,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:36,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754185438] [2021-06-05 14:05:36,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:36,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:37,015 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-06-05 14:05:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:05:37,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:37,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754185438] [2021-06-05 14:05:37,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754185438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:37,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998804243] [2021-06-05 14:05:37,055 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 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 14:05:37,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:05:37,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:37,091 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:05:37,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:37,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:37,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:05:37,984 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 207 [2021-06-05 14:05:38,197 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 213 [2021-06-05 14:05:39,149 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 213 [2021-06-05 14:05:39,278 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 233 [2021-06-05 14:05:39,446 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 233 [2021-06-05 14:05:39,588 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 388 DAG size of output: 237 [2021-06-05 14:05:40,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:05:40,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:40,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:05:40,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:05:40,156 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:40,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998804243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:40,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:40,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:05:40,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574562997] [2021-06-05 14:05:40,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:05:40,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:40,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:05:40,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:05:40,157 INFO L87 Difference]: Start difference. First operand 1650 states and 5256 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:40,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:40,533 INFO L93 Difference]: Finished difference Result 1674 states and 5294 transitions. [2021-06-05 14:05:40,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:05:40,533 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 14:05:40,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:40,536 INFO L225 Difference]: With dead ends: 1674 [2021-06-05 14:05:40,536 INFO L226 Difference]: Without dead ends: 1661 [2021-06-05 14:05:40,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 467.0ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:05:40,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-06-05 14:05:40,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1650. [2021-06-05 14:05:40,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1649 states have (on average 3.1861734384475437) internal successors, (5254), 1649 states have internal predecessors, (5254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:40,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 5254 transitions. [2021-06-05 14:05:40,558 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 5254 transitions. Word has length 19 [2021-06-05 14:05:40,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:40,558 INFO L482 AbstractCegarLoop]: Abstraction has 1650 states and 5254 transitions. [2021-06-05 14:05:40,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:40,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 5254 transitions. [2021-06-05 14:05:40,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:40,560 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:40,560 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:40,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20583,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:40,782 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:40,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:40,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1558288827, now seen corresponding path program 203 times [2021-06-05 14:05:40,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:40,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564285328] [2021-06-05 14:05:40,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:40,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:40,927 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:05:40,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:40,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564285328] [2021-06-05 14:05:40,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564285328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:40,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392249155] [2021-06-05 14:05:40,927 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 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 14:05:40,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:05:40,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:40,970 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:05:40,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:41,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:41,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:05:41,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:05:41,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:41,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:05:41,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:05:41,860 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:41,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392249155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:41,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:41,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:05:41,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789671212] [2021-06-05 14:05:41,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:05:41,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:41,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:05:41,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:05:41,861 INFO L87 Difference]: Start difference. First operand 1650 states and 5254 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:42,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:42,250 INFO L93 Difference]: Finished difference Result 1675 states and 5302 transitions. [2021-06-05 14:05:42,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:05:42,250 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 14:05:42,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:42,252 INFO L225 Difference]: With dead ends: 1675 [2021-06-05 14:05:42,253 INFO L226 Difference]: Without dead ends: 1666 [2021-06-05 14:05:42,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 437.3ms TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:05:42,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1666 states. [2021-06-05 14:05:42,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1666 to 1652. [2021-06-05 14:05:42,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1652 states, 1651 states have (on average 3.1859479103573594) internal successors, (5260), 1651 states have internal predecessors, (5260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:42,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1652 states to 1652 states and 5260 transitions. [2021-06-05 14:05:42,275 INFO L78 Accepts]: Start accepts. Automaton has 1652 states and 5260 transitions. Word has length 19 [2021-06-05 14:05:42,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:42,275 INFO L482 AbstractCegarLoop]: Abstraction has 1652 states and 5260 transitions. [2021-06-05 14:05:42,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:42,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1652 states and 5260 transitions. [2021-06-05 14:05:42,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:42,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:42,277 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:42,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20834,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:42,497 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:42,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:42,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1993095109, now seen corresponding path program 204 times [2021-06-05 14:05:42,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:42,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417226966] [2021-06-05 14:05:42,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:42,616 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:05:42,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:42,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417226966] [2021-06-05 14:05:42,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417226966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:42,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153466226] [2021-06-05 14:05:42,617 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 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 14:05:42,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:05:42,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:42,650 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:05:42,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:43,032 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:05:43,033 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:43,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:05:44,160 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 251 [2021-06-05 14:05:45,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:05:45,300 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:45,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:05:47,089 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:05:47,110 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:05:47,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:05:47,111 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:05:47,147 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:47,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153466226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:47,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:47,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:05:47,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248608326] [2021-06-05 14:05:47,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:05:47,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:47,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:05:47,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:05:47,148 INFO L87 Difference]: Start difference. First operand 1652 states and 5260 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:47,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:47,752 INFO L93 Difference]: Finished difference Result 1724 states and 5414 transitions. [2021-06-05 14:05:47,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:05:47,753 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 14:05:47,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:47,756 INFO L225 Difference]: With dead ends: 1724 [2021-06-05 14:05:47,756 INFO L226 Difference]: Without dead ends: 1714 [2021-06-05 14:05:47,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 454.1ms TimeCoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:05:47,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-06-05 14:05:47,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1651. [2021-06-05 14:05:47,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.186060606060606) internal successors, (5257), 1650 states have internal predecessors, (5257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:47,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5257 transitions. [2021-06-05 14:05:47,780 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5257 transitions. Word has length 19 [2021-06-05 14:05:47,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:47,780 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5257 transitions. [2021-06-05 14:05:47,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:47,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5257 transitions. [2021-06-05 14:05:47,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:47,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:47,782 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:48,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20930,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:48,006 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:48,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:48,006 INFO L82 PathProgramCache]: Analyzing trace with hash -218856773, now seen corresponding path program 205 times [2021-06-05 14:05:48,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:48,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339931111] [2021-06-05 14:05:48,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:48,140 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:48,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:48,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339931111] [2021-06-05 14:05:48,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339931111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:48,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590472888] [2021-06-05 14:05:48,141 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 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 14:05:48,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:48,177 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:05:48,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:48,644 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:05:48,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:48,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:05:50,417 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 233 [2021-06-05 14:05:50,546 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 233 [2021-06-05 14:05:50,692 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 238 [2021-06-05 14:05:50,916 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 321 [2021-06-05 14:05:51,625 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 230 [2021-06-05 14:05:52,334 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 212 [2021-06-05 14:05:52,547 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 319 [2021-06-05 14:05:52,771 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 319 [2021-06-05 14:05:52,989 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 475 DAG size of output: 321 [2021-06-05 14:05:53,109 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 226 [2021-06-05 14:05:53,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:05:53,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:53,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:05:54,789 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:05:54,810 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:05:54,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:05:54,811 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:05:54,846 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:54,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590472888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:54,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:54,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:05:54,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780764540] [2021-06-05 14:05:54,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:05:54,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:54,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:05:54,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:05:54,847 INFO L87 Difference]: Start difference. First operand 1651 states and 5257 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:55,298 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-06-05 14:05:55,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:55,955 INFO L93 Difference]: Finished difference Result 1757 states and 5501 transitions. [2021-06-05 14:05:55,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:05:55,955 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:05:55,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:55,957 INFO L225 Difference]: With dead ends: 1757 [2021-06-05 14:05:55,957 INFO L226 Difference]: Without dead ends: 1747 [2021-06-05 14:05:55,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1169.7ms TimeCoverageRelationStatistics Valid=253, Invalid=1469, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:05:55,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2021-06-05 14:05:55,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 1651. [2021-06-05 14:05:55,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.186060606060606) internal successors, (5257), 1650 states have internal predecessors, (5257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:55,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5257 transitions. [2021-06-05 14:05:55,981 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5257 transitions. Word has length 19 [2021-06-05 14:05:55,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:55,981 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5257 transitions. [2021-06-05 14:05:55,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:05:55,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5257 transitions. [2021-06-05 14:05:55,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:05:55,983 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:55,983 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:56,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21384,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:56,193 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:56,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:56,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1486313951, now seen corresponding path program 206 times [2021-06-05 14:05:56,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:56,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752586486] [2021-06-05 14:05:56,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:56,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:56,327 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:05:56,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:56,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752586486] [2021-06-05 14:05:56,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752586486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:56,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19093127] [2021-06-05 14:05:56,327 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 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 14:05:56,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:05:56,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:56,359 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:05:56,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:56,827 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:05:56,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:05:56,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:05:57,577 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 187 [2021-06-05 14:05:57,730 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 232 [2021-06-05 14:05:57,895 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 257 [2021-06-05 14:05:58,711 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 328 [2021-06-05 14:05:58,942 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 328 [2021-06-05 14:05:59,219 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 335 [2021-06-05 14:05:59,593 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 392 [2021-06-05 14:06:00,329 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 244 [2021-06-05 14:06:00,462 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 244 [2021-06-05 14:06:00,615 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 149 [2021-06-05 14:06:00,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:06:00,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:06:00,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:06:01,305 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:06:01,326 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:06:01,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:06:01,327 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:06:01,361 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:01,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19093127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:01,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:01,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:06:01,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45200523] [2021-06-05 14:06:01,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:06:01,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:01,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:06:01,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:06:01,362 INFO L87 Difference]: Start difference. First operand 1651 states and 5257 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:02,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:02,445 INFO L93 Difference]: Finished difference Result 1826 states and 5698 transitions. [2021-06-05 14:06:02,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:06:02,445 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:06:02,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:02,448 INFO L225 Difference]: With dead ends: 1826 [2021-06-05 14:06:02,448 INFO L226 Difference]: Without dead ends: 1816 [2021-06-05 14:06:02,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1085.5ms TimeCoverageRelationStatistics Valid=283, Invalid=1697, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 14:06:02,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2021-06-05 14:06:02,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1651. [2021-06-05 14:06:02,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.186060606060606) internal successors, (5257), 1650 states have internal predecessors, (5257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:02,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5257 transitions. [2021-06-05 14:06:02,471 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5257 transitions. Word has length 19 [2021-06-05 14:06:02,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:02,471 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5257 transitions. [2021-06-05 14:06:02,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:02,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5257 transitions. [2021-06-05 14:06:02,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:06:02,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:02,473 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:02,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21887,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:06:02,696 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:02,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:02,697 INFO L82 PathProgramCache]: Analyzing trace with hash 258970085, now seen corresponding path program 207 times [2021-06-05 14:06:02,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:02,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422169583] [2021-06-05 14:06:02,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:02,832 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:02,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:02,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422169583] [2021-06-05 14:06:02,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422169583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:02,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323745636] [2021-06-05 14:06:02,832 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 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 14:06:02,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:06:02,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:02,906 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:06:02,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:03,367 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:06:03,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:06:03,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:06:04,046 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 199 [2021-06-05 14:06:04,593 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 211 [2021-06-05 14:06:04,711 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 211 [2021-06-05 14:06:04,843 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 216 [2021-06-05 14:06:04,950 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 248 [2021-06-05 14:06:05,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:06:05,617 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:06:05,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:06:06,763 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:06:06,784 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:06:06,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:06:06,785 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:06:06,820 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:06,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323745636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:06,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:06,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:06:06,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979859698] [2021-06-05 14:06:06,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:06:06,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:06,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:06:06,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:06:06,837 INFO L87 Difference]: Start difference. First operand 1651 states and 5257 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:07,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:07,895 INFO L93 Difference]: Finished difference Result 1724 states and 5388 transitions. [2021-06-05 14:06:07,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:06:07,895 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:06:07,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:07,898 INFO L225 Difference]: With dead ends: 1724 [2021-06-05 14:06:07,898 INFO L226 Difference]: Without dead ends: 1714 [2021-06-05 14:06:07,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1199.2ms TimeCoverageRelationStatistics Valid=294, Invalid=1686, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 14:06:07,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-06-05 14:06:07,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1651. [2021-06-05 14:06:07,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.186060606060606) internal successors, (5257), 1650 states have internal predecessors, (5257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:07,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5257 transitions. [2021-06-05 14:06:07,921 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5257 transitions. Word has length 19 [2021-06-05 14:06:07,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:07,921 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5257 transitions. [2021-06-05 14:06:07,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:07,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5257 transitions. [2021-06-05 14:06:07,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:06:07,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:07,923 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:08,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22338 [2021-06-05 14:06:08,141 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:08,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:08,141 INFO L82 PathProgramCache]: Analyzing trace with hash -891850757, now seen corresponding path program 208 times [2021-06-05 14:06:08,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:08,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367231649] [2021-06-05 14:06:08,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:08,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:08,288 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:08,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:08,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367231649] [2021-06-05 14:06:08,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367231649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:08,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072138899] [2021-06-05 14:06:08,288 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 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 14:06:08,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:06:08,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:08,320 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:06:08,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:08,705 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 14:06:08,706 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:06:08,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:06:09,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:06:09,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:06:09,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:06:09,318 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:06:09,322 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:09,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072138899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:09,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:09,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:06:09,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182978271] [2021-06-05 14:06:09,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:06:09,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:09,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:06:09,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:06:09,323 INFO L87 Difference]: Start difference. First operand 1651 states and 5257 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:09,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:09,920 INFO L93 Difference]: Finished difference Result 1678 states and 5309 transitions. [2021-06-05 14:06:09,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:06:09,920 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:06:09,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:09,922 INFO L225 Difference]: With dead ends: 1678 [2021-06-05 14:06:09,922 INFO L226 Difference]: Without dead ends: 1669 [2021-06-05 14:06:09,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 521.0ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:06:09,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2021-06-05 14:06:09,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1651. [2021-06-05 14:06:09,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.1854545454545455) internal successors, (5256), 1650 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:09,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5256 transitions. [2021-06-05 14:06:09,944 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5256 transitions. Word has length 19 [2021-06-05 14:06:09,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:09,945 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5256 transitions. [2021-06-05 14:06:09,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:09,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5256 transitions. [2021-06-05 14:06:09,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:06:09,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:09,946 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:10,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22765 [2021-06-05 14:06:10,169 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:10,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:10,169 INFO L82 PathProgramCache]: Analyzing trace with hash -148267397, now seen corresponding path program 209 times [2021-06-05 14:06:10,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:10,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684777639] [2021-06-05 14:06:10,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:10,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:10,286 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:06:10,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:10,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684777639] [2021-06-05 14:06:10,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684777639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:10,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256936359] [2021-06-05 14:06:10,286 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 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 14:06:10,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:06:10,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:10,320 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:06:10,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:10,689 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:06:10,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:06:10,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:06:12,179 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 214 [2021-06-05 14:06:12,317 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 223 [2021-06-05 14:06:12,439 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 213 [2021-06-05 14:06:13,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:06:13,524 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:06:13,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:06:14,137 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:06:14,158 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:06:14,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:06:14,159 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:06:14,194 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:14,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256936359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:14,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:14,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:06:14,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788432412] [2021-06-05 14:06:14,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:06:14,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:14,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:06:14,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:06:14,195 INFO L87 Difference]: Start difference. First operand 1651 states and 5256 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:15,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:15,066 INFO L93 Difference]: Finished difference Result 1770 states and 5538 transitions. [2021-06-05 14:06:15,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 14:06:15,066 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:06:15,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:15,069 INFO L225 Difference]: With dead ends: 1770 [2021-06-05 14:06:15,069 INFO L226 Difference]: Without dead ends: 1760 [2021-06-05 14:06:15,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 671.3ms TimeCoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:06:15,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1760 states. [2021-06-05 14:06:15,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1760 to 1651. [2021-06-05 14:06:15,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.1854545454545455) internal successors, (5256), 1650 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:15,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5256 transitions. [2021-06-05 14:06:15,093 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5256 transitions. Word has length 19 [2021-06-05 14:06:15,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:15,093 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5256 transitions. [2021-06-05 14:06:15,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:15,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5256 transitions. [2021-06-05 14:06:15,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:06:15,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:15,095 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:15,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22875,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:06:15,318 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:15,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:15,319 INFO L82 PathProgramCache]: Analyzing trace with hash 702876735, now seen corresponding path program 210 times [2021-06-05 14:06:15,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:15,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278800728] [2021-06-05 14:06:15,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:15,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:15,428 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:15,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:15,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278800728] [2021-06-05 14:06:15,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278800728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:15,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375109170] [2021-06-05 14:06:15,429 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 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 14:06:15,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:06:15,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:15,466 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:06:15,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:15,855 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:06:15,856 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:06:15,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:06:16,555 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 239 [2021-06-05 14:06:17,423 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 179 [2021-06-05 14:06:17,565 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 232 [2021-06-05 14:06:18,623 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 195 [2021-06-05 14:06:18,933 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 588 DAG size of output: 400 [2021-06-05 14:06:19,471 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 651 DAG size of output: 437 [2021-06-05 14:06:19,870 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 651 DAG size of output: 437 [2021-06-05 14:06:20,307 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 656 DAG size of output: 442 [2021-06-05 14:06:20,659 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 361 [2021-06-05 14:06:20,871 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 218 [2021-06-05 14:06:21,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:06:21,576 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:06:21,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:06:22,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:06:22,196 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:06:22,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:06:22,197 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:06:22,230 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:22,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375109170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:22,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:22,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:06:22,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768622122] [2021-06-05 14:06:22,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:06:22,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:22,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:06:22,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:06:22,231 INFO L87 Difference]: Start difference. First operand 1651 states and 5256 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:23,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:23,352 INFO L93 Difference]: Finished difference Result 1871 states and 5788 transitions. [2021-06-05 14:06:23,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 14:06:23,352 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:06:23,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:23,355 INFO L225 Difference]: With dead ends: 1871 [2021-06-05 14:06:23,355 INFO L226 Difference]: Without dead ends: 1861 [2021-06-05 14:06:23,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 878.6ms TimeCoverageRelationStatistics Valid=240, Invalid=1922, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 14:06:23,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-06-05 14:06:23,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1631. [2021-06-05 14:06:23,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1630 states have (on average 3.1846625766871166) internal successors, (5191), 1630 states have internal predecessors, (5191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:23,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 5191 transitions. [2021-06-05 14:06:23,379 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 5191 transitions. Word has length 19 [2021-06-05 14:06:23,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:23,379 INFO L482 AbstractCegarLoop]: Abstraction has 1631 states and 5191 transitions. [2021-06-05 14:06:23,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:23,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 5191 transitions. [2021-06-05 14:06:23,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:06:23,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:23,381 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:23,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23189 [2021-06-05 14:06:23,599 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:23,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:23,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1318541051, now seen corresponding path program 211 times [2021-06-05 14:06:23,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:23,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393075481] [2021-06-05 14:06:23,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:23,775 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:23,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:23,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393075481] [2021-06-05 14:06:23,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393075481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:23,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499926236] [2021-06-05 14:06:23,776 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 14:06:23,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:23,819 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:06:23,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:24,229 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:06:24,229 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:06:24,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:06:24,894 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 207 [2021-06-05 14:06:26,195 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 187 [2021-06-05 14:06:26,365 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 229 [2021-06-05 14:06:26,859 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 378 [2021-06-05 14:06:27,139 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 378 [2021-06-05 14:06:27,488 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 546 DAG size of output: 383 [2021-06-05 14:06:27,731 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 438 [2021-06-05 14:06:28,014 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 244 [2021-06-05 14:06:28,128 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 199 [2021-06-05 14:06:28,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:06:29,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:06:29,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:06:30,133 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:06:30,155 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:06:30,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:06:30,155 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:06:30,227 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:30,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499926236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:30,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:30,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:06:30,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375536477] [2021-06-05 14:06:30,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:06:30,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:30,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:06:30,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:06:30,228 INFO L87 Difference]: Start difference. First operand 1631 states and 5191 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:31,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:31,736 INFO L93 Difference]: Finished difference Result 1825 states and 5631 transitions. [2021-06-05 14:06:31,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 14:06:31,737 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:06:31,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:31,740 INFO L225 Difference]: With dead ends: 1825 [2021-06-05 14:06:31,740 INFO L226 Difference]: Without dead ends: 1813 [2021-06-05 14:06:31,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 1264.4ms TimeCoverageRelationStatistics Valid=346, Invalid=2410, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 14:06:31,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1813 states. [2021-06-05 14:06:31,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1813 to 1647. [2021-06-05 14:06:31,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1646 states have (on average 3.1883353584447143) internal successors, (5248), 1646 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:31,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 5248 transitions. [2021-06-05 14:06:31,763 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 5248 transitions. Word has length 19 [2021-06-05 14:06:31,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:31,763 INFO L482 AbstractCegarLoop]: Abstraction has 1647 states and 5248 transitions. [2021-06-05 14:06:31,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:31,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 5248 transitions. [2021-06-05 14:06:31,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:06:31,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:31,765 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:31,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23825,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:06:31,980 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:31,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:31,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1070701633, now seen corresponding path program 212 times [2021-06-05 14:06:31,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:31,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274174648] [2021-06-05 14:06:31,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:31,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:32,097 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:06:32,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:32,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274174648] [2021-06-05 14:06:32,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274174648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:32,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282726865] [2021-06-05 14:06:32,097 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 14:06:32,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:06:32,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:32,145 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:06:32,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:32,553 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:06:32,553 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:06:32,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:06:33,542 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 181 [2021-06-05 14:06:34,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:06:34,741 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:06:34,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:06:35,351 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 232 [2021-06-05 14:06:36,242 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:06:36,263 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:06:36,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:06:36,264 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:06:36,298 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:36,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282726865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:36,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:36,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:06:36,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248618469] [2021-06-05 14:06:36,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:06:36,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:36,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:06:36,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:06:36,299 INFO L87 Difference]: Start difference. First operand 1647 states and 5248 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:37,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:37,513 INFO L93 Difference]: Finished difference Result 1792 states and 5550 transitions. [2021-06-05 14:06:37,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:06:37,513 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:06:37,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:37,515 INFO L225 Difference]: With dead ends: 1792 [2021-06-05 14:06:37,516 INFO L226 Difference]: Without dead ends: 1780 [2021-06-05 14:06:37,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 1131.2ms TimeCoverageRelationStatistics Valid=356, Invalid=2094, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 14:06:37,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2021-06-05 14:06:37,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 1649. [2021-06-05 14:06:37,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1648 states have (on average 3.183859223300971) internal successors, (5247), 1648 states have internal predecessors, (5247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:37,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 5247 transitions. [2021-06-05 14:06:37,540 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 5247 transitions. Word has length 19 [2021-06-05 14:06:37,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:37,540 INFO L482 AbstractCegarLoop]: Abstraction has 1649 states and 5247 transitions. [2021-06-05 14:06:37,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:37,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 5247 transitions. [2021-06-05 14:06:37,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:06:37,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:37,542 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:37,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24317,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:06:37,749 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:37,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:37,749 INFO L82 PathProgramCache]: Analyzing trace with hash -2122780805, now seen corresponding path program 213 times [2021-06-05 14:06:37,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:37,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96860144] [2021-06-05 14:06:37,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:37,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:37,881 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:37,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:37,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96860144] [2021-06-05 14:06:37,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96860144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:37,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393422933] [2021-06-05 14:06:37,882 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 14:06:37,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:06:37,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:37,926 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:06:37,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:38,350 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:06:38,350 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:06:38,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:06:38,994 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 237 [2021-06-05 14:06:39,131 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 251 [2021-06-05 14:06:39,285 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 251 [2021-06-05 14:06:39,448 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 262 [2021-06-05 14:06:39,777 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 329 [2021-06-05 14:06:39,944 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 282 [2021-06-05 14:06:40,129 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 246 [2021-06-05 14:06:41,043 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 234 [2021-06-05 14:06:41,341 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 276 [2021-06-05 14:06:41,555 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 304 [2021-06-05 14:06:41,988 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 354 [2021-06-05 14:06:42,523 WARN L205 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 553 DAG size of output: 452 [2021-06-05 14:06:43,147 WARN L205 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 649 DAG size of output: 492 [2021-06-05 14:06:43,864 WARN L205 SmtUtils]: Spent 713.00 ms on a formula simplification. DAG size of input: 696 DAG size of output: 535 [2021-06-05 14:06:44,616 WARN L205 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 696 DAG size of output: 535 [2021-06-05 14:06:45,383 WARN L205 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 701 DAG size of output: 540 [2021-06-05 14:06:45,834 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 542 DAG size of output: 427 [2021-06-05 14:06:46,180 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 310 [2021-06-05 14:06:46,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:06:46,907 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 14:06:46,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:06:46,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:06:47,220 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:06:47,240 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:06:47,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:06:47,241 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:06:47,275 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:47,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393422933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:47,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:47,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:06:47,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155451201] [2021-06-05 14:06:47,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:06:47,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:47,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:06:47,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:06:47,276 INFO L87 Difference]: Start difference. First operand 1649 states and 5247 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:48,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:48,415 INFO L93 Difference]: Finished difference Result 1801 states and 5581 transitions. [2021-06-05 14:06:48,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:06:48,416 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:06:48,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:48,418 INFO L225 Difference]: With dead ends: 1801 [2021-06-05 14:06:48,418 INFO L226 Difference]: Without dead ends: 1791 [2021-06-05 14:06:48,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1127.3ms TimeCoverageRelationStatistics Valid=295, Invalid=1685, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 14:06:48,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1791 states. [2021-06-05 14:06:48,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1791 to 1647. [2021-06-05 14:06:48,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1646 states have (on average 3.1859052247873634) internal successors, (5244), 1646 states have internal predecessors, (5244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:48,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 5244 transitions. [2021-06-05 14:06:48,438 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 5244 transitions. Word has length 19 [2021-06-05 14:06:48,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:48,438 INFO L482 AbstractCegarLoop]: Abstraction has 1647 states and 5244 transitions. [2021-06-05 14:06:48,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:48,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 5244 transitions. [2021-06-05 14:06:48,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:06:48,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:48,440 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:48,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24781,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:06:48,662 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:48,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:48,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1987737538, now seen corresponding path program 214 times [2021-06-05 14:06:48,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:48,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847697706] [2021-06-05 14:06:48,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:48,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:48,715 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:48,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:48,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847697706] [2021-06-05 14:06:48,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847697706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:48,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33835089] [2021-06-05 14:06:48,716 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 14:06:48,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:06:48,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:48,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:06:48,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:48,787 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:48,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33835089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:48,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:48,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:06:48,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733442432] [2021-06-05 14:06:48,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:06:48,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:48,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:06:48,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:06:48,788 INFO L87 Difference]: Start difference. First operand 1647 states and 5244 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:48,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:48,915 INFO L93 Difference]: Finished difference Result 2586 states and 8045 transitions. [2021-06-05 14:06:48,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:06:48,915 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 14:06:48,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:48,918 INFO L225 Difference]: With dead ends: 2586 [2021-06-05 14:06:48,918 INFO L226 Difference]: Without dead ends: 2586 [2021-06-05 14:06:48,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 105.3ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:06:48,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2586 states. [2021-06-05 14:06:48,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2586 to 2300. [2021-06-05 14:06:48,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 2299 states have (on average 3.222270552414093) internal successors, (7408), 2299 states have internal predecessors, (7408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:48,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 7408 transitions. [2021-06-05 14:06:48,952 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 7408 transitions. Word has length 19 [2021-06-05 14:06:48,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:48,952 INFO L482 AbstractCegarLoop]: Abstraction has 2300 states and 7408 transitions. [2021-06-05 14:06:48,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:48,952 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 7408 transitions. [2021-06-05 14:06:48,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:06:48,954 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:48,954 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:49,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25315 [2021-06-05 14:06:49,155 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:49,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:49,155 INFO L82 PathProgramCache]: Analyzing trace with hash -377496769, now seen corresponding path program 215 times [2021-06-05 14:06:49,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:49,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743802663] [2021-06-05 14:06:49,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:49,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:49,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:49,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743802663] [2021-06-05 14:06:49,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743802663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:49,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236443083] [2021-06-05 14:06:49,340 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 14:06:49,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:06:49,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:49,369 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:06:49,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:49,830 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:06:49,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:06:49,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:06:51,522 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 171 [2021-06-05 14:06:51,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:06:51,958 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:06:51,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:06:52,193 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:06:52,211 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:06:52,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:06:52,212 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:06:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:52,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236443083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:52,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:52,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:06:52,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100799830] [2021-06-05 14:06:52,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:06:52,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:52,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:06:52,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:06:52,242 INFO L87 Difference]: Start difference. First operand 2300 states and 7408 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:53,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:53,045 INFO L93 Difference]: Finished difference Result 2369 states and 7524 transitions. [2021-06-05 14:06:53,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:06:53,045 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:06:53,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:53,048 INFO L225 Difference]: With dead ends: 2369 [2021-06-05 14:06:53,048 INFO L226 Difference]: Without dead ends: 2359 [2021-06-05 14:06:53,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1022.0ms TimeCoverageRelationStatistics Valid=274, Invalid=1448, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:06:53,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2021-06-05 14:06:53,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2300. [2021-06-05 14:06:53,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 2299 states have (on average 3.222270552414093) internal successors, (7408), 2299 states have internal predecessors, (7408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:53,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 7408 transitions. [2021-06-05 14:06:53,077 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 7408 transitions. Word has length 19 [2021-06-05 14:06:53,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:53,077 INFO L482 AbstractCegarLoop]: Abstraction has 2300 states and 7408 transitions. [2021-06-05 14:06:53,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:53,077 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 7408 transitions. [2021-06-05 14:06:53,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:06:53,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:53,079 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:53,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25316 [2021-06-05 14:06:53,280 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:53,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:53,280 INFO L82 PathProgramCache]: Analyzing trace with hash -504602600, now seen corresponding path program 216 times [2021-06-05 14:06:53,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:53,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100253761] [2021-06-05 14:06:53,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:53,334 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:53,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:53,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100253761] [2021-06-05 14:06:53,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100253761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:53,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022575922] [2021-06-05 14:06:53,334 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 14:06:53,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:06:53,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:53,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:06:53,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:53,407 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:53,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022575922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:53,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:53,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:06:53,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644899870] [2021-06-05 14:06:53,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:06:53,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:53,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:06:53,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:06:53,408 INFO L87 Difference]: Start difference. First operand 2300 states and 7408 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:53,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:53,564 INFO L93 Difference]: Finished difference Result 2557 states and 7954 transitions. [2021-06-05 14:06:53,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:06:53,564 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 14:06:53,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:53,566 INFO L225 Difference]: With dead ends: 2557 [2021-06-05 14:06:53,566 INFO L226 Difference]: Without dead ends: 2557 [2021-06-05 14:06:53,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 134.5ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:06:53,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2021-06-05 14:06:53,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 2355. [2021-06-05 14:06:53,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2354 states have (on average 3.2196261682242993) internal successors, (7579), 2354 states have internal predecessors, (7579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:53,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 7579 transitions. [2021-06-05 14:06:53,593 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 7579 transitions. Word has length 19 [2021-06-05 14:06:53,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:53,593 INFO L482 AbstractCegarLoop]: Abstraction has 2355 states and 7579 transitions. [2021-06-05 14:06:53,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:06:53,593 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 7579 transitions. [2021-06-05 14:06:53,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:06:53,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:53,594 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:53,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25586,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:06:53,795 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:53,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:53,796 INFO L82 PathProgramCache]: Analyzing trace with hash -2108266501, now seen corresponding path program 217 times [2021-06-05 14:06:53,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:53,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703809875] [2021-06-05 14:06:53,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:53,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:53,925 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:06:53,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:53,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703809875] [2021-06-05 14:06:53,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703809875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:53,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706103812] [2021-06-05 14:06:53,925 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 14:06:53,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:53,950 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:06:53,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:54,341 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:06:54,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:06:55,139 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 419 DAG size of output: 337 [2021-06-05 14:06:55,306 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 434 DAG size of output: 351 [2021-06-05 14:06:55,495 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 434 DAG size of output: 351 [2021-06-05 14:06:55,710 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 362 [2021-06-05 14:06:55,932 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 418 [2021-06-05 14:06:56,289 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 474 [2021-06-05 14:06:56,836 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 249 [2021-06-05 14:06:57,488 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 251 [2021-06-05 14:06:57,767 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 340 [2021-06-05 14:06:58,012 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 551 DAG size of output: 349 [2021-06-05 14:06:58,370 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 738 DAG size of output: 447 [2021-06-05 14:06:58,873 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 820 DAG size of output: 519 [2021-06-05 14:06:59,361 WARN L205 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 820 DAG size of output: 519 [2021-06-05 14:06:59,884 WARN L205 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 827 DAG size of output: 526 [2021-06-05 14:07:00,680 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 454 DAG size of output: 454 [2021-06-05 14:07:00,805 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 237 [2021-06-05 14:07:01,824 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 563 DAG size of output: 269 [2021-06-05 14:07:01,960 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 563 DAG size of output: 269 [2021-06-05 14:07:02,087 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 178 [2021-06-05 14:07:02,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:07:02,373 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:02,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:07:02,895 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:07:02,913 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:07:02,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:07:02,914 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:07:02,943 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:02,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706103812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:02,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:02,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:07:02,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667735986] [2021-06-05 14:07:02,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:07:02,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:02,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:07:02,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:07:02,944 INFO L87 Difference]: Start difference. First operand 2355 states and 7579 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:03,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:03,729 INFO L93 Difference]: Finished difference Result 2414 states and 7678 transitions. [2021-06-05 14:07:03,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:07:03,729 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:07:03,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:03,732 INFO L225 Difference]: With dead ends: 2414 [2021-06-05 14:07:03,732 INFO L226 Difference]: Without dead ends: 2404 [2021-06-05 14:07:03,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 974.8ms TimeCoverageRelationStatistics Valid=297, Invalid=1509, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 14:07:03,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2021-06-05 14:07:03,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 2357. [2021-06-05 14:07:03,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2357 states, 2356 states have (on average 3.2181663837011882) internal successors, (7582), 2356 states have internal predecessors, (7582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:03,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2357 states to 2357 states and 7582 transitions. [2021-06-05 14:07:03,757 INFO L78 Accepts]: Start accepts. Automaton has 2357 states and 7582 transitions. Word has length 19 [2021-06-05 14:07:03,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:03,757 INFO L482 AbstractCegarLoop]: Abstraction has 2357 states and 7582 transitions. [2021-06-05 14:07:03,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:03,757 INFO L276 IsEmpty]: Start isEmpty. Operand 2357 states and 7582 transitions. [2021-06-05 14:07:03,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:07:03,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:03,758 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:03,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25587 [2021-06-05 14:07:03,959 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:03,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:03,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1772059778, now seen corresponding path program 218 times [2021-06-05 14:07:03,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:03,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270650294] [2021-06-05 14:07:03,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:03,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:04,009 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:04,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:04,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270650294] [2021-06-05 14:07:04,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270650294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:04,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069129383] [2021-06-05 14:07:04,009 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 14:07:04,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:07:04,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:04,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:07:04,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:04,070 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:04,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069129383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:04,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:04,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:07:04,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848163854] [2021-06-05 14:07:04,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:07:04,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:04,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:07:04,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:07:04,071 INFO L87 Difference]: Start difference. First operand 2357 states and 7582 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:04,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:04,286 INFO L93 Difference]: Finished difference Result 2614 states and 8095 transitions. [2021-06-05 14:07:04,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:07:04,286 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 14:07:04,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:04,288 INFO L225 Difference]: With dead ends: 2614 [2021-06-05 14:07:04,288 INFO L226 Difference]: Without dead ends: 2614 [2021-06-05 14:07:04,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 185.0ms TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:07:04,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2614 states. [2021-06-05 14:07:04,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2614 to 2378. [2021-06-05 14:07:04,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 3.216238956668069) internal successors, (7645), 2377 states have internal predecessors, (7645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:04,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 7645 transitions. [2021-06-05 14:07:04,314 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 7645 transitions. Word has length 19 [2021-06-05 14:07:04,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:04,314 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 7645 transitions. [2021-06-05 14:07:04,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:04,314 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 7645 transitions. [2021-06-05 14:07:04,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:07:04,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:04,315 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:04,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26380,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:07:04,516 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:04,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:04,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1053335259, now seen corresponding path program 219 times [2021-06-05 14:07:04,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:04,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996583272] [2021-06-05 14:07:04,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:04,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:04,640 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:04,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:04,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996583272] [2021-06-05 14:07:04,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996583272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:04,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383294245] [2021-06-05 14:07:04,640 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 14:07:04,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:07:04,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:04,680 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 14:07:04,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:05,009 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:05,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:07:05,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:07:05,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:05,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:07:05,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:07:05,246 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:05,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383294245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:05,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:05,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:07:05,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83830774] [2021-06-05 14:07:05,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:07:05,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:05,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:07:05,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:07:05,247 INFO L87 Difference]: Start difference. First operand 2378 states and 7645 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:05,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:05,694 INFO L93 Difference]: Finished difference Result 2419 states and 7720 transitions. [2021-06-05 14:07:05,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:07:05,695 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:07:05,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:05,697 INFO L225 Difference]: With dead ends: 2419 [2021-06-05 14:07:05,697 INFO L226 Difference]: Without dead ends: 2404 [2021-06-05 14:07:05,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 360.3ms TimeCoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:07:05,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2021-06-05 14:07:05,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 2381. [2021-06-05 14:07:05,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 3.2147058823529413) internal successors, (7651), 2380 states have internal predecessors, (7651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:05,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 7651 transitions. [2021-06-05 14:07:05,724 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 7651 transitions. Word has length 19 [2021-06-05 14:07:05,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:05,724 INFO L482 AbstractCegarLoop]: Abstraction has 2381 states and 7651 transitions. [2021-06-05 14:07:05,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:05,724 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 7651 transitions. [2021-06-05 14:07:05,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:07:05,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:05,726 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:05,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26381,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:07:05,926 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:05,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:05,926 INFO L82 PathProgramCache]: Analyzing trace with hash -201001835, now seen corresponding path program 220 times [2021-06-05 14:07:05,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:05,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719979001] [2021-06-05 14:07:05,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:05,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:06,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:06,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719979001] [2021-06-05 14:07:06,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719979001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:06,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231023232] [2021-06-05 14:07:06,051 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 14:07:06,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:07:06,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:06,076 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:07:06,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:06,379 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:06,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:07:07,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:07:07,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:07,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:07:07,056 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:07:07,060 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:07,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231023232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:07,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:07,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:07:07,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195811027] [2021-06-05 14:07:07,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:07:07,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:07,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:07:07,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:07:07,061 INFO L87 Difference]: Start difference. First operand 2381 states and 7651 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:07,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:07,588 INFO L93 Difference]: Finished difference Result 2420 states and 7731 transitions. [2021-06-05 14:07:07,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:07:07,589 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:07:07,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:07,592 INFO L225 Difference]: With dead ends: 2420 [2021-06-05 14:07:07,592 INFO L226 Difference]: Without dead ends: 2411 [2021-06-05 14:07:07,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 380.4ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:07:07,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2021-06-05 14:07:07,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 2384. [2021-06-05 14:07:07,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2384 states, 2383 states have (on average 3.214435585396559) internal successors, (7660), 2383 states have internal predecessors, (7660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:07,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2384 states to 2384 states and 7660 transitions. [2021-06-05 14:07:07,617 INFO L78 Accepts]: Start accepts. Automaton has 2384 states and 7660 transitions. Word has length 19 [2021-06-05 14:07:07,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:07,617 INFO L482 AbstractCegarLoop]: Abstraction has 2384 states and 7660 transitions. [2021-06-05 14:07:07,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:07,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2384 states and 7660 transitions. [2021-06-05 14:07:07,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:07:07,619 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:07,619 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:07,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26477,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:07:07,820 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:07,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:07,820 INFO L82 PathProgramCache]: Analyzing trace with hash 542581525, now seen corresponding path program 221 times [2021-06-05 14:07:07,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:07,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949507238] [2021-06-05 14:07:07,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:07,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:07,950 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:07,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:07,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949507238] [2021-06-05 14:07:07,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949507238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:07,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135566956] [2021-06-05 14:07:07,950 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 14:07:07,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:07:07,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:07,982 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:07:07,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:08,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:08,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:07:09,750 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 419 DAG size of output: 312 [2021-06-05 14:07:09,926 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 331 [2021-06-05 14:07:10,125 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 331 [2021-06-05 14:07:10,323 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 492 DAG size of output: 338 [2021-06-05 14:07:10,615 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 384 [2021-06-05 14:07:10,920 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 203 [2021-06-05 14:07:11,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:07:11,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:11,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:07:12,230 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:07:12,248 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:07:12,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:07:12,249 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:07:12,280 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:12,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135566956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:12,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:12,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:07:12,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719180860] [2021-06-05 14:07:12,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:07:12,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:12,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:07:12,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:07:12,281 INFO L87 Difference]: Start difference. First operand 2384 states and 7660 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:12,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:12,715 INFO L93 Difference]: Finished difference Result 2508 states and 7952 transitions. [2021-06-05 14:07:12,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:07:12,715 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:07:12,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:12,718 INFO L225 Difference]: With dead ends: 2508 [2021-06-05 14:07:12,718 INFO L226 Difference]: Without dead ends: 2498 [2021-06-05 14:07:12,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 444.1ms TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:07:12,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-06-05 14:07:12,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2382. [2021-06-05 14:07:12,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2382 states, 2381 states have (on average 3.2150356992860143) internal successors, (7655), 2381 states have internal predecessors, (7655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:12,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2382 states to 2382 states and 7655 transitions. [2021-06-05 14:07:12,744 INFO L78 Accepts]: Start accepts. Automaton has 2382 states and 7655 transitions. Word has length 19 [2021-06-05 14:07:12,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:12,744 INFO L482 AbstractCegarLoop]: Abstraction has 2382 states and 7655 transitions. [2021-06-05 14:07:12,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:12,744 INFO L276 IsEmpty]: Start isEmpty. Operand 2382 states and 7655 transitions. [2021-06-05 14:07:12,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:07:12,746 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:12,746 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:12,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26589 [2021-06-05 14:07:12,946 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:12,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:12,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1500320577, now seen corresponding path program 222 times [2021-06-05 14:07:12,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:12,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415544117] [2021-06-05 14:07:12,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:13,061 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:13,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:13,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415544117] [2021-06-05 14:07:13,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415544117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:13,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478738914] [2021-06-05 14:07:13,062 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 14:07:13,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:07:13,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:13,088 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:07:13,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:13,459 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:07:13,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:13,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:07:14,803 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 244 [2021-06-05 14:07:14,908 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 269 [2021-06-05 14:07:15,080 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 240 [2021-06-05 14:07:15,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:07:15,708 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:15,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:07:16,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:07:16,295 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:07:16,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:07:16,295 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:07:16,324 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:16,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478738914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:16,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:16,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:07:16,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331948640] [2021-06-05 14:07:16,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:07:16,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:16,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:07:16,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:07:16,325 INFO L87 Difference]: Start difference. First operand 2382 states and 7655 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:17,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:17,214 INFO L93 Difference]: Finished difference Result 2503 states and 7954 transitions. [2021-06-05 14:07:17,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:07:17,215 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:07:17,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:17,217 INFO L225 Difference]: With dead ends: 2503 [2021-06-05 14:07:17,217 INFO L226 Difference]: Without dead ends: 2493 [2021-06-05 14:07:17,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 952.9ms TimeCoverageRelationStatistics Valid=318, Invalid=1844, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 14:07:17,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2021-06-05 14:07:17,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2382. [2021-06-05 14:07:17,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2382 states, 2381 states have (on average 3.2150356992860143) internal successors, (7655), 2381 states have internal predecessors, (7655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:17,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2382 states to 2382 states and 7655 transitions. [2021-06-05 14:07:17,242 INFO L78 Accepts]: Start accepts. Automaton has 2382 states and 7655 transitions. Word has length 19 [2021-06-05 14:07:17,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:17,242 INFO L482 AbstractCegarLoop]: Abstraction has 2382 states and 7655 transitions. [2021-06-05 14:07:17,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:17,242 INFO L276 IsEmpty]: Start isEmpty. Operand 2382 states and 7655 transitions. [2021-06-05 14:07:17,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:07:17,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:17,244 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:17,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27140 [2021-06-05 14:07:17,445 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:17,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:17,445 INFO L82 PathProgramCache]: Analyzing trace with hash -440749611, now seen corresponding path program 223 times [2021-06-05 14:07:17,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:17,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192666505] [2021-06-05 14:07:17,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:17,532 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:07:17,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:17,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192666505] [2021-06-05 14:07:17,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192666505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:17,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830859068] [2021-06-05 14:07:17,532 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) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:07:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:17,557 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:07:17,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:17,873 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:17,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:07:18,383 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 188 [2021-06-05 14:07:19,072 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 239 [2021-06-05 14:07:19,191 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 239 [2021-06-05 14:07:19,355 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 244 [2021-06-05 14:07:19,469 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 241 [2021-06-05 14:07:19,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:07:19,873 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:19,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:07:20,569 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:07:20,595 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:07:20,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:07:20,596 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:07:20,630 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:20,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830859068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:20,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:20,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:07:20,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388796708] [2021-06-05 14:07:20,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:07:20,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:20,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:07:20,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:07:20,631 INFO L87 Difference]: Start difference. First operand 2382 states and 7655 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:21,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:21,547 INFO L93 Difference]: Finished difference Result 2624 states and 8231 transitions. [2021-06-05 14:07:21,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 14:07:21,547 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 14:07:21,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:21,550 INFO L225 Difference]: With dead ends: 2624 [2021-06-05 14:07:21,550 INFO L226 Difference]: Without dead ends: 2612 [2021-06-05 14:07:21,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 839.1ms TimeCoverageRelationStatistics Valid=346, Invalid=2306, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 14:07:21,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2612 states. [2021-06-05 14:07:21,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2612 to 2395. [2021-06-05 14:07:21,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2394 states have (on average 3.215956558061821) internal successors, (7699), 2394 states have internal predecessors, (7699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:21,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 7699 transitions. [2021-06-05 14:07:21,576 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 7699 transitions. Word has length 19 [2021-06-05 14:07:21,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:21,577 INFO L482 AbstractCegarLoop]: Abstraction has 2395 states and 7699 transitions. [2021-06-05 14:07:21,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:21,577 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 7699 transitions. [2021-06-05 14:07:21,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:07:21,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:21,578 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:21,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27516 [2021-06-05 14:07:21,779 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:21,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:21,779 INFO L82 PathProgramCache]: Analyzing trace with hash -2136787431, now seen corresponding path program 224 times [2021-06-05 14:07:21,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:21,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277756562] [2021-06-05 14:07:21,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:21,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:21,893 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:21,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:21,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277756562] [2021-06-05 14:07:21,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277756562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:21,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8749936] [2021-06-05 14:07:21,893 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 14:07:21,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:07:21,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:21,916 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:07:21,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:22,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:22,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:07:23,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:07:23,134 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:23,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:07:24,123 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:07:24,141 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:07:24,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:07:24,142 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:07:24,170 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:24,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8749936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:24,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:24,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:07:24,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160792524] [2021-06-05 14:07:24,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:07:24,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:24,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:07:24,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:07:24,171 INFO L87 Difference]: Start difference. First operand 2395 states and 7699 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:25,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:25,102 INFO L93 Difference]: Finished difference Result 2495 states and 7900 transitions. [2021-06-05 14:07:25,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:07:25,103 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:07:25,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:25,105 INFO L225 Difference]: With dead ends: 2495 [2021-06-05 14:07:25,105 INFO L226 Difference]: Without dead ends: 2485 [2021-06-05 14:07:25,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1040.1ms TimeCoverageRelationStatistics Valid=336, Invalid=1826, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 14:07:25,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2485 states. [2021-06-05 14:07:25,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2485 to 2395. [2021-06-05 14:07:25,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2394 states have (on average 3.215956558061821) internal successors, (7699), 2394 states have internal predecessors, (7699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:25,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 7699 transitions. [2021-06-05 14:07:25,132 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 7699 transitions. Word has length 19 [2021-06-05 14:07:25,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:25,132 INFO L482 AbstractCegarLoop]: Abstraction has 2395 states and 7699 transitions. [2021-06-05 14:07:25,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:25,132 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 7699 transitions. [2021-06-05 14:07:25,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:07:25,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:25,133 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:25,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27878 [2021-06-05 14:07:25,334 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:25,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:25,334 INFO L82 PathProgramCache]: Analyzing trace with hash 427410133, now seen corresponding path program 225 times [2021-06-05 14:07:25,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:25,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277619100] [2021-06-05 14:07:25,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:25,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:25,448 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:25,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:25,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277619100] [2021-06-05 14:07:25,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277619100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:25,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524846936] [2021-06-05 14:07:25,448 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 14:07:25,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:07:25,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:25,475 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:07:25,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:25,855 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:25,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:07:26,371 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 277 [2021-06-05 14:07:26,498 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 284 [2021-06-05 14:07:26,610 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 295 [2021-06-05 14:07:26,717 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 295 [2021-06-05 14:07:26,849 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 306 [2021-06-05 14:07:26,974 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 300 [2021-06-05 14:07:27,087 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 295 [2021-06-05 14:07:27,781 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 185 [2021-06-05 14:07:28,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:07:28,210 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:28,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:07:28,648 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 220 [2021-06-05 14:07:29,155 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:07:29,173 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:07:29,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:07:29,174 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:07:29,204 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:29,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524846936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:29,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:29,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:07:29,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988879795] [2021-06-05 14:07:29,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:07:29,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:29,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:07:29,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:07:29,205 INFO L87 Difference]: Start difference. First operand 2395 states and 7699 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:30,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:30,104 INFO L93 Difference]: Finished difference Result 2453 states and 7797 transitions. [2021-06-05 14:07:30,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:07:30,105 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:07:30,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:30,108 INFO L225 Difference]: With dead ends: 2453 [2021-06-05 14:07:30,108 INFO L226 Difference]: Without dead ends: 2443 [2021-06-05 14:07:30,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1015.3ms TimeCoverageRelationStatistics Valid=332, Invalid=1648, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 14:07:30,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2443 states. [2021-06-05 14:07:30,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2443 to 2395. [2021-06-05 14:07:30,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2394 states have (on average 3.215956558061821) internal successors, (7699), 2394 states have internal predecessors, (7699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:30,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 7699 transitions. [2021-06-05 14:07:30,134 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 7699 transitions. Word has length 19 [2021-06-05 14:07:30,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:30,134 INFO L482 AbstractCegarLoop]: Abstraction has 2395 states and 7699 transitions. [2021-06-05 14:07:30,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:30,134 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 7699 transitions. [2021-06-05 14:07:30,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:07:30,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:30,136 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:30,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28250,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:07:30,341 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:30,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:30,341 INFO L82 PathProgramCache]: Analyzing trace with hash -906777413, now seen corresponding path program 226 times [2021-06-05 14:07:30,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:30,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786406866] [2021-06-05 14:07:30,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:30,467 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:30,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:30,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786406866] [2021-06-05 14:07:30,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786406866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:30,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649401457] [2021-06-05 14:07:30,467 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 14:07:30,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:07:30,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:30,494 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:07:30,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:30,799 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:30,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:07:31,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:07:31,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:31,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:07:31,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-06-05 14:07:31,763 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:31,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649401457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:31,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:31,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:07:31,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626650418] [2021-06-05 14:07:31,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:07:31,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:31,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:07:31,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:07:31,764 INFO L87 Difference]: Start difference. First operand 2395 states and 7699 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:32,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:32,228 INFO L93 Difference]: Finished difference Result 2431 states and 7773 transitions. [2021-06-05 14:07:32,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:07:32,228 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:07:32,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:32,231 INFO L225 Difference]: With dead ends: 2431 [2021-06-05 14:07:32,231 INFO L226 Difference]: Without dead ends: 2422 [2021-06-05 14:07:32,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 345.4ms TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:07:32,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2021-06-05 14:07:32,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 2396. [2021-06-05 14:07:32,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2396 states, 2395 states have (on average 3.215866388308977) internal successors, (7702), 2395 states have internal predecessors, (7702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:32,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2396 states to 2396 states and 7702 transitions. [2021-06-05 14:07:32,256 INFO L78 Accepts]: Start accepts. Automaton has 2396 states and 7702 transitions. Word has length 19 [2021-06-05 14:07:32,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:32,256 INFO L482 AbstractCegarLoop]: Abstraction has 2396 states and 7702 transitions. [2021-06-05 14:07:32,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:32,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2396 states and 7702 transitions. [2021-06-05 14:07:32,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:07:32,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:32,258 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:32,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28650 [2021-06-05 14:07:32,459 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:32,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:32,459 INFO L82 PathProgramCache]: Analyzing trace with hash -163194053, now seen corresponding path program 227 times [2021-06-05 14:07:32,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:32,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870491582] [2021-06-05 14:07:32,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:32,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:32,583 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:32,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:32,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870491582] [2021-06-05 14:07:32,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870491582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:32,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772040794] [2021-06-05 14:07:32,584 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 14:07:32,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:07:32,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:32,608 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:07:32,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:32,939 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:32,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:07:33,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:07:33,795 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:33,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:07:34,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:07:34,297 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:07:34,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:07:34,298 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:07:34,330 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:34,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772040794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:34,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:34,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:07:34,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566284586] [2021-06-05 14:07:34,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:07:34,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:34,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:07:34,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:07:34,331 INFO L87 Difference]: Start difference. First operand 2396 states and 7702 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:35,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:35,129 INFO L93 Difference]: Finished difference Result 2570 states and 8139 transitions. [2021-06-05 14:07:35,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 14:07:35,130 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:07:35,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:35,132 INFO L225 Difference]: With dead ends: 2570 [2021-06-05 14:07:35,132 INFO L226 Difference]: Without dead ends: 2560 [2021-06-05 14:07:35,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 590.3ms TimeCoverageRelationStatistics Valid=162, Invalid=1398, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:07:35,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2021-06-05 14:07:35,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 2395. [2021-06-05 14:07:35,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2394 states have (on average 3.215956558061821) internal successors, (7699), 2394 states have internal predecessors, (7699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:35,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 7699 transitions. [2021-06-05 14:07:35,158 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 7699 transitions. Word has length 19 [2021-06-05 14:07:35,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:35,158 INFO L482 AbstractCegarLoop]: Abstraction has 2395 states and 7699 transitions. [2021-06-05 14:07:35,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:35,158 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 7699 transitions. [2021-06-05 14:07:35,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:07:35,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:35,160 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:35,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28834,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:07:35,361 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:35,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:35,361 INFO L82 PathProgramCache]: Analyzing trace with hash 687950079, now seen corresponding path program 228 times [2021-06-05 14:07:35,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:35,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477945726] [2021-06-05 14:07:35,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:35,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:35,482 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:35,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:35,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477945726] [2021-06-05 14:07:35,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477945726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:35,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132023098] [2021-06-05 14:07:35,482 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 14:07:35,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:07:35,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:35,508 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:07:35,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:35,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:35,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:07:37,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:07:37,340 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:37,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:07:37,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:07:37,926 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:07:37,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:07:37,927 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:07:37,955 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:37,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132023098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:37,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:37,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:07:37,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858688427] [2021-06-05 14:07:37,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:07:37,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:37,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:07:37,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:07:37,956 INFO L87 Difference]: Start difference. First operand 2395 states and 7699 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:39,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:39,028 INFO L93 Difference]: Finished difference Result 2690 states and 8440 transitions. [2021-06-05 14:07:39,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 14:07:39,029 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:07:39,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:39,032 INFO L225 Difference]: With dead ends: 2690 [2021-06-05 14:07:39,032 INFO L226 Difference]: Without dead ends: 2680 [2021-06-05 14:07:39,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 889.7ms TimeCoverageRelationStatistics Valid=289, Invalid=2363, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 14:07:39,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-06-05 14:07:39,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2245. [2021-06-05 14:07:39,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2245 states, 2244 states have (on average 3.2076648841354722) internal successors, (7198), 2244 states have internal predecessors, (7198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:39,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 7198 transitions. [2021-06-05 14:07:39,057 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 7198 transitions. Word has length 19 [2021-06-05 14:07:39,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:39,057 INFO L482 AbstractCegarLoop]: Abstraction has 2245 states and 7198 transitions. [2021-06-05 14:07:39,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:39,057 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 7198 transitions. [2021-06-05 14:07:39,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:07:39,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:39,059 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:39,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable29092 [2021-06-05 14:07:39,259 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:39,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:39,259 INFO L82 PathProgramCache]: Analyzing trace with hash 26686296, now seen corresponding path program 229 times [2021-06-05 14:07:39,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:39,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984274429] [2021-06-05 14:07:39,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:39,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:39,305 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:39,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:39,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984274429] [2021-06-05 14:07:39,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984274429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:39,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037552785] [2021-06-05 14:07:39,306 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 14:07:39,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:39,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:07:39,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:39,364 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:07:39,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037552785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:39,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:39,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:07:39,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400821874] [2021-06-05 14:07:39,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:07:39,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:39,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:07:39,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:07:39,365 INFO L87 Difference]: Start difference. First operand 2245 states and 7198 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:39,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:39,444 INFO L93 Difference]: Finished difference Result 2914 states and 8965 transitions. [2021-06-05 14:07:39,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:07:39,444 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 14:07:39,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:39,447 INFO L225 Difference]: With dead ends: 2914 [2021-06-05 14:07:39,447 INFO L226 Difference]: Without dead ends: 2914 [2021-06-05 14:07:39,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:07:39,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2914 states. [2021-06-05 14:07:39,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2914 to 2672. [2021-06-05 14:07:39,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2672 states, 2671 states have (on average 3.2100336952452264) internal successors, (8574), 2671 states have internal predecessors, (8574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:39,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2672 states to 2672 states and 8574 transitions. [2021-06-05 14:07:39,477 INFO L78 Accepts]: Start accepts. Automaton has 2672 states and 8574 transitions. Word has length 19 [2021-06-05 14:07:39,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:39,477 INFO L482 AbstractCegarLoop]: Abstraction has 2672 states and 8574 transitions. [2021-06-05 14:07:39,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:39,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2672 states and 8574 transitions. [2021-06-05 14:07:39,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:07:39,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:39,479 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:39,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29452,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:07:39,679 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:39,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:39,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1303614395, now seen corresponding path program 230 times [2021-06-05 14:07:39,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:39,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90012219] [2021-06-05 14:07:39,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:39,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:39,786 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:39,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:39,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90012219] [2021-06-05 14:07:39,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90012219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:39,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962230008] [2021-06-05 14:07:39,787 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 14:07:39,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:07:39,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:39,813 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:07:39,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:40,153 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:40,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:07:40,651 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 201 [2021-06-05 14:07:41,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:07:41,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:41,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:07:42,221 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:07:42,239 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:07:42,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:07:42,240 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:07:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:42,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962230008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:42,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:42,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:07:42,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894985829] [2021-06-05 14:07:42,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:07:42,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:42,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:07:42,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:07:42,270 INFO L87 Difference]: Start difference. First operand 2672 states and 8574 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:43,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:43,486 INFO L93 Difference]: Finished difference Result 3059 states and 9551 transitions. [2021-06-05 14:07:43,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 14:07:43,486 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:07:43,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:43,489 INFO L225 Difference]: With dead ends: 3059 [2021-06-05 14:07:43,489 INFO L226 Difference]: Without dead ends: 3049 [2021-06-05 14:07:43,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 1036.8ms TimeCoverageRelationStatistics Valid=409, Invalid=3013, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 14:07:43,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2021-06-05 14:07:43,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 2623. [2021-06-05 14:07:43,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2623 states, 2622 states have (on average 3.2070938215102975) internal successors, (8409), 2622 states have internal predecessors, (8409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:43,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2623 states to 2623 states and 8409 transitions. [2021-06-05 14:07:43,518 INFO L78 Accepts]: Start accepts. Automaton has 2623 states and 8409 transitions. Word has length 19 [2021-06-05 14:07:43,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:43,518 INFO L482 AbstractCegarLoop]: Abstraction has 2623 states and 8409 transitions. [2021-06-05 14:07:43,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:43,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2623 states and 8409 transitions. [2021-06-05 14:07:43,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:07:43,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:43,520 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:43,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29453,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:07:43,721 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:43,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:43,721 INFO L82 PathProgramCache]: Analyzing trace with hash -2034173506, now seen corresponding path program 231 times [2021-06-05 14:07:43,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:43,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172283347] [2021-06-05 14:07:43,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:43,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:43,760 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:43,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:43,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172283347] [2021-06-05 14:07:43,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172283347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:43,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680231229] [2021-06-05 14:07:43,760 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 14:07:43,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:07:43,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:43,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:07:43,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:43,822 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:43,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680231229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:43,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:43,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:07:43,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705198280] [2021-06-05 14:07:43,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:07:43,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:43,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:07:43,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:07:43,823 INFO L87 Difference]: Start difference. First operand 2623 states and 8409 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:43,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:43,939 INFO L93 Difference]: Finished difference Result 2885 states and 8823 transitions. [2021-06-05 14:07:43,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:07:43,940 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 14:07:43,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:43,942 INFO L225 Difference]: With dead ends: 2885 [2021-06-05 14:07:43,942 INFO L226 Difference]: Without dead ends: 2885 [2021-06-05 14:07:43,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:07:43,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2021-06-05 14:07:43,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2399. [2021-06-05 14:07:43,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2399 states, 2398 states have (on average 3.187656380316931) internal successors, (7644), 2398 states have internal predecessors, (7644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:43,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2399 states to 2399 states and 7644 transitions. [2021-06-05 14:07:43,969 INFO L78 Accepts]: Start accepts. Automaton has 2399 states and 7644 transitions. Word has length 19 [2021-06-05 14:07:43,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:43,969 INFO L482 AbstractCegarLoop]: Abstraction has 2399 states and 7644 transitions. [2021-06-05 14:07:43,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:43,970 INFO L276 IsEmpty]: Start isEmpty. Operand 2399 states and 7644 transitions. [2021-06-05 14:07:43,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:07:43,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:43,971 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:44,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable29771 [2021-06-05 14:07:44,172 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:44,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:44,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1085628289, now seen corresponding path program 232 times [2021-06-05 14:07:44,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:44,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093137739] [2021-06-05 14:07:44,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:44,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:44,274 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:44,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:44,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093137739] [2021-06-05 14:07:44,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093137739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:44,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137021261] [2021-06-05 14:07:44,275 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 14:07:44,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:07:44,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:44,300 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:07:44,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:44,648 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:07:44,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:44,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:07:45,794 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 602 DAG size of output: 494 [2021-06-05 14:07:46,010 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 602 DAG size of output: 494 [2021-06-05 14:07:46,288 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 613 DAG size of output: 505 [2021-06-05 14:07:46,748 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 507 DAG size of output: 569 [2021-06-05 14:07:47,757 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 294 [2021-06-05 14:07:48,324 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 441 DAG size of output: 383 [2021-06-05 14:07:48,799 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 295 [2021-06-05 14:07:49,323 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 655 DAG size of output: 506 [2021-06-05 14:07:50,231 WARN L205 SmtUtils]: Spent 904.00 ms on a formula simplification. DAG size of input: 841 DAG size of output: 619 [2021-06-05 14:07:51,082 WARN L205 SmtUtils]: Spent 847.00 ms on a formula simplification. DAG size of input: 841 DAG size of output: 619 [2021-06-05 14:07:52,054 WARN L205 SmtUtils]: Spent 968.00 ms on a formula simplification. DAG size of input: 846 DAG size of output: 624 [2021-06-05 14:07:52,474 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 473 [2021-06-05 14:07:53,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:07:53,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:53,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:07:53,861 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:07:53,881 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:07:53,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:07:53,882 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:07:53,915 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:53,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137021261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:53,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:53,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:07:53,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518817608] [2021-06-05 14:07:53,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:07:53,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:53,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:07:53,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:07:53,916 INFO L87 Difference]: Start difference. First operand 2399 states and 7644 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:55,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:55,578 INFO L93 Difference]: Finished difference Result 2756 states and 8561 transitions. [2021-06-05 14:07:55,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 14:07:55,578 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:07:55,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:55,581 INFO L225 Difference]: With dead ends: 2756 [2021-06-05 14:07:55,582 INFO L226 Difference]: Without dead ends: 2744 [2021-06-05 14:07:55,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 1371.4ms TimeCoverageRelationStatistics Valid=484, Invalid=2822, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 14:07:55,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2744 states. [2021-06-05 14:07:55,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2744 to 2477. [2021-06-05 14:07:55,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 2476 states have (on average 3.1902261712439417) internal successors, (7899), 2476 states have internal predecessors, (7899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:55,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 7899 transitions. [2021-06-05 14:07:55,618 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 7899 transitions. Word has length 19 [2021-06-05 14:07:55,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:55,618 INFO L482 AbstractCegarLoop]: Abstraction has 2477 states and 7899 transitions. [2021-06-05 14:07:55,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:55,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 7899 transitions. [2021-06-05 14:07:55,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:07:55,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:55,621 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:55,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29772,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:07:55,843 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:55,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:55,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1496317928, now seen corresponding path program 233 times [2021-06-05 14:07:55,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:55,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213860190] [2021-06-05 14:07:55,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:55,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:55,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:55,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213860190] [2021-06-05 14:07:55,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213860190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:55,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209145050] [2021-06-05 14:07:55,947 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 14:07:56,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:07:56,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:56,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:07:56,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:56,080 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:07:56,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209145050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:56,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:56,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:07:56,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093233320] [2021-06-05 14:07:56,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:07:56,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:56,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:07:56,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:07:56,081 INFO L87 Difference]: Start difference. First operand 2477 states and 7899 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:56,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:56,195 INFO L93 Difference]: Finished difference Result 3089 states and 9579 transitions. [2021-06-05 14:07:56,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:07:56,196 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 14:07:56,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:56,199 INFO L225 Difference]: With dead ends: 3089 [2021-06-05 14:07:56,200 INFO L226 Difference]: Without dead ends: 3089 [2021-06-05 14:07:56,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:07:56,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3089 states. [2021-06-05 14:07:56,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3089 to 2881. [2021-06-05 14:07:56,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2881 states, 2880 states have (on average 3.1899305555555557) internal successors, (9187), 2880 states have internal predecessors, (9187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:56,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2881 states to 2881 states and 9187 transitions. [2021-06-05 14:07:56,244 INFO L78 Accepts]: Start accepts. Automaton has 2881 states and 9187 transitions. Word has length 19 [2021-06-05 14:07:56,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:56,244 INFO L482 AbstractCegarLoop]: Abstraction has 2881 states and 9187 transitions. [2021-06-05 14:07:56,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:07:56,244 INFO L276 IsEmpty]: Start isEmpty. Operand 2881 states and 9187 transitions. [2021-06-05 14:07:56,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:07:56,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:56,247 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:56,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30406,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:07:56,447 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:56,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:56,448 INFO L82 PathProgramCache]: Analyzing trace with hash -2137707461, now seen corresponding path program 234 times [2021-06-05 14:07:56,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:56,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079409795] [2021-06-05 14:07:56,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:56,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:56,598 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:07:56,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:56,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079409795] [2021-06-05 14:07:56,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079409795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:56,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177622075] [2021-06-05 14:07:56,598 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 14:07:56,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:07:56,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:56,633 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:07:56,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:57,066 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:07:57,066 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:07:57,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:07:57,877 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 220 [2021-06-05 14:07:58,032 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 210 [2021-06-05 14:07:58,214 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 244 [2021-06-05 14:07:59,407 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 157 [2021-06-05 14:07:59,537 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 183 [2021-06-05 14:07:59,697 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 226 [2021-06-05 14:07:59,900 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 431 DAG size of output: 239 [2021-06-05 14:08:00,670 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 239 [2021-06-05 14:08:00,803 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 256 [2021-06-05 14:08:01,158 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 745 DAG size of output: 381 [2021-06-05 14:08:01,526 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 756 DAG size of output: 382 [2021-06-05 14:08:01,942 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 756 DAG size of output: 382 [2021-06-05 14:08:02,354 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 761 DAG size of output: 387 [2021-06-05 14:08:02,573 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 282 [2021-06-05 14:08:03,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:08:03,176 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:08:03,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:08:03,820 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 274 [2021-06-05 14:08:03,953 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 251 [2021-06-05 14:08:04,081 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 245 [2021-06-05 14:08:04,248 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 254 [2021-06-05 14:08:05,420 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 197 [2021-06-05 14:08:05,925 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 504 DAG size of output: 253 [2021-06-05 14:08:06,049 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 504 DAG size of output: 253 [2021-06-05 14:08:06,186 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 508 DAG size of output: 257 [2021-06-05 14:08:06,294 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 284 [2021-06-05 14:08:06,574 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:08:06,595 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:08:06,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:08:06,596 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:08:06,629 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:06,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177622075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:06,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:06,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:08:06,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101341396] [2021-06-05 14:08:06,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:08:06,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:06,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:08:06,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:08:06,631 INFO L87 Difference]: Start difference. First operand 2881 states and 9187 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:08,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:08,009 INFO L93 Difference]: Finished difference Result 3023 states and 9474 transitions. [2021-06-05 14:08:08,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 14:08:08,010 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:08:08,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:08,014 INFO L225 Difference]: With dead ends: 3023 [2021-06-05 14:08:08,014 INFO L226 Difference]: Without dead ends: 3013 [2021-06-05 14:08:08,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 1375.6ms TimeCoverageRelationStatistics Valid=426, Invalid=2226, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 14:08:08,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3013 states. [2021-06-05 14:08:08,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3013 to 2883. [2021-06-05 14:08:08,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2883 states, 2882 states have (on average 3.1887578070784177) internal successors, (9190), 2882 states have internal predecessors, (9190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:08,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2883 states to 2883 states and 9190 transitions. [2021-06-05 14:08:08,057 INFO L78 Accepts]: Start accepts. Automaton has 2883 states and 9190 transitions. Word has length 19 [2021-06-05 14:08:08,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:08,057 INFO L482 AbstractCegarLoop]: Abstraction has 2883 states and 9190 transitions. [2021-06-05 14:08:08,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:08,057 INFO L276 IsEmpty]: Start isEmpty. Operand 2883 states and 9190 transitions. [2021-06-05 14:08:08,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:08:08,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:08,060 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:08,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30407 [2021-06-05 14:08:08,283 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:08,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:08,283 INFO L82 PathProgramCache]: Analyzing trace with hash -2002664194, now seen corresponding path program 235 times [2021-06-05 14:08:08,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:08,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771197092] [2021-06-05 14:08:08,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:08,331 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:08:08,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:08,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771197092] [2021-06-05 14:08:08,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771197092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:08,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6324749] [2021-06-05 14:08:08,331 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 14:08:08,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:08,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:08:08,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:08,405 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:08:08,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6324749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:08,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:08,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:08:08,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124290369] [2021-06-05 14:08:08,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:08:08,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:08,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:08:08,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:08:08,406 INFO L87 Difference]: Start difference. First operand 2883 states and 9190 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:08,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:08,489 INFO L93 Difference]: Finished difference Result 3131 states and 9825 transitions. [2021-06-05 14:08:08,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:08:08,490 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 14:08:08,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:08,493 INFO L225 Difference]: With dead ends: 3131 [2021-06-05 14:08:08,493 INFO L226 Difference]: Without dead ends: 3131 [2021-06-05 14:08:08,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:08,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2021-06-05 14:08:08,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 3025. [2021-06-05 14:08:08,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3025 states, 3024 states have (on average 3.181878306878307) internal successors, (9622), 3024 states have internal predecessors, (9622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:08,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3025 states to 3025 states and 9622 transitions. [2021-06-05 14:08:08,538 INFO L78 Accepts]: Start accepts. Automaton has 3025 states and 9622 transitions. Word has length 19 [2021-06-05 14:08:08,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:08,538 INFO L482 AbstractCegarLoop]: Abstraction has 3025 states and 9622 transitions. [2021-06-05 14:08:08,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:08,538 INFO L276 IsEmpty]: Start isEmpty. Operand 3025 states and 9622 transitions. [2021-06-05 14:08:08,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:08:08,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:08,542 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:08,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31140,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:08,760 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:08,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:08,760 INFO L82 PathProgramCache]: Analyzing trace with hash -392423425, now seen corresponding path program 236 times [2021-06-05 14:08:08,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:08,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499125596] [2021-06-05 14:08:08,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:08,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:08,897 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:08,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:08,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499125596] [2021-06-05 14:08:08,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499125596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:08,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363566966] [2021-06-05 14:08:08,897 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 14:08:08,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:08:08,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:08,928 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:08:08,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:09,399 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:08:09,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:08:09,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:08:10,708 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 200 [2021-06-05 14:08:10,927 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 208 [2021-06-05 14:08:11,039 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 201 [2021-06-05 14:08:11,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:08:11,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:08:11,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:08:12,026 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 202 [2021-06-05 14:08:12,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:08:12,918 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:08:12,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:08:12,919 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:08:12,953 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:12,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363566966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:12,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:12,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:08:12,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436761229] [2021-06-05 14:08:12,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:08:12,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:12,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:08:12,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:08:12,954 INFO L87 Difference]: Start difference. First operand 3025 states and 9622 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:14,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:14,164 INFO L93 Difference]: Finished difference Result 3173 states and 9925 transitions. [2021-06-05 14:08:14,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:08:14,164 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:08:14,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:14,168 INFO L225 Difference]: With dead ends: 3173 [2021-06-05 14:08:14,168 INFO L226 Difference]: Without dead ends: 3163 [2021-06-05 14:08:14,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1269.6ms TimeCoverageRelationStatistics Valid=348, Invalid=1814, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 14:08:14,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3163 states. [2021-06-05 14:08:14,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3163 to 3021. [2021-06-05 14:08:14,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3021 states, 3020 states have (on average 3.1841059602649007) internal successors, (9616), 3020 states have internal predecessors, (9616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:14,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3021 states to 3021 states and 9616 transitions. [2021-06-05 14:08:14,201 INFO L78 Accepts]: Start accepts. Automaton has 3021 states and 9616 transitions. Word has length 19 [2021-06-05 14:08:14,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:14,201 INFO L482 AbstractCegarLoop]: Abstraction has 3021 states and 9616 transitions. [2021-06-05 14:08:14,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:14,201 INFO L276 IsEmpty]: Start isEmpty. Operand 3021 states and 9616 transitions. [2021-06-05 14:08:14,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:08:14,203 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:14,203 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:14,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31141 [2021-06-05 14:08:14,404 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:14,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:14,404 INFO L82 PathProgramCache]: Analyzing trace with hash -519529256, now seen corresponding path program 237 times [2021-06-05 14:08:14,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:14,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931812067] [2021-06-05 14:08:14,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:14,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:14,460 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:14,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:14,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931812067] [2021-06-05 14:08:14,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931812067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:14,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091758530] [2021-06-05 14:08:14,460 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 14:08:14,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:08:14,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:14,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:08:14,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:14,534 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:14,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091758530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:14,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:14,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:08:14,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430806834] [2021-06-05 14:08:14,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:08:14,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:14,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:08:14,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:08:14,535 INFO L87 Difference]: Start difference. First operand 3021 states and 9616 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:14,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:14,682 INFO L93 Difference]: Finished difference Result 3182 states and 9942 transitions. [2021-06-05 14:08:14,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:08:14,683 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 14:08:14,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:14,687 INFO L225 Difference]: With dead ends: 3182 [2021-06-05 14:08:14,687 INFO L226 Difference]: Without dead ends: 3182 [2021-06-05 14:08:14,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 124.3ms TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:08:14,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2021-06-05 14:08:14,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 3046. [2021-06-05 14:08:14,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3046 states, 3045 states have (on average 3.182594417077176) internal successors, (9691), 3045 states have internal predecessors, (9691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:14,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3046 states to 3046 states and 9691 transitions. [2021-06-05 14:08:14,732 INFO L78 Accepts]: Start accepts. Automaton has 3046 states and 9691 transitions. Word has length 19 [2021-06-05 14:08:14,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:14,732 INFO L482 AbstractCegarLoop]: Abstraction has 3046 states and 9691 transitions. [2021-06-05 14:08:14,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:14,732 INFO L276 IsEmpty]: Start isEmpty. Operand 3046 states and 9691 transitions. [2021-06-05 14:08:14,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:08:14,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:14,735 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:14,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31481,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:14,953 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:14,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:14,953 INFO L82 PathProgramCache]: Analyzing trace with hash -2123193157, now seen corresponding path program 238 times [2021-06-05 14:08:14,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:14,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806148764] [2021-06-05 14:08:14,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:14,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:15,086 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:15,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:15,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806148764] [2021-06-05 14:08:15,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806148764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:15,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012022176] [2021-06-05 14:08:15,086 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 14:08:15,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:08:15,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:15,120 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:08:15,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:15,582 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:08:15,583 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:08:15,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:08:16,688 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 195 [2021-06-05 14:08:17,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:08:17,541 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:08:17,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:08:18,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:08:18,211 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:08:18,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:08:18,212 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:08:18,246 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:18,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012022176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:18,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:18,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:08:18,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270843122] [2021-06-05 14:08:18,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:08:18,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:18,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:08:18,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:08:18,257 INFO L87 Difference]: Start difference. First operand 3046 states and 9691 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:19,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:19,463 INFO L93 Difference]: Finished difference Result 3126 states and 9832 transitions. [2021-06-05 14:08:19,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:08:19,463 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:08:19,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:19,467 INFO L225 Difference]: With dead ends: 3126 [2021-06-05 14:08:19,467 INFO L226 Difference]: Without dead ends: 3116 [2021-06-05 14:08:19,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1344.8ms TimeCoverageRelationStatistics Valid=342, Invalid=1638, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 14:08:19,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2021-06-05 14:08:19,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 3046. [2021-06-05 14:08:19,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3046 states, 3045 states have (on average 3.182594417077176) internal successors, (9691), 3045 states have internal predecessors, (9691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:19,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3046 states to 3046 states and 9691 transitions. [2021-06-05 14:08:19,514 INFO L78 Accepts]: Start accepts. Automaton has 3046 states and 9691 transitions. Word has length 19 [2021-06-05 14:08:19,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:19,514 INFO L482 AbstractCegarLoop]: Abstraction has 3046 states and 9691 transitions. [2021-06-05 14:08:19,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:19,514 INFO L276 IsEmpty]: Start isEmpty. Operand 3046 states and 9691 transitions. [2021-06-05 14:08:19,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:08:19,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:19,517 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:19,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31482,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:19,741 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:19,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:19,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1786986434, now seen corresponding path program 239 times [2021-06-05 14:08:19,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:19,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821869658] [2021-06-05 14:08:19,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:19,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:19,804 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:19,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:19,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821869658] [2021-06-05 14:08:19,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821869658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:19,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610712381] [2021-06-05 14:08:19,804 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 14:08:19,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:08:19,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:19,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:08:19,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:19,882 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:19,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610712381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:19,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:19,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:08:19,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004019036] [2021-06-05 14:08:19,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:08:19,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:19,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:08:19,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:08:19,883 INFO L87 Difference]: Start difference. First operand 3046 states and 9691 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:20,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:20,076 INFO L93 Difference]: Finished difference Result 3257 states and 10135 transitions. [2021-06-05 14:08:20,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:08:20,076 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 14:08:20,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:20,080 INFO L225 Difference]: With dead ends: 3257 [2021-06-05 14:08:20,080 INFO L226 Difference]: Without dead ends: 3257 [2021-06-05 14:08:20,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 166.2ms TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:08:20,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3257 states. [2021-06-05 14:08:20,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3257 to 3085. [2021-06-05 14:08:20,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3085 states, 3084 states have (on average 3.180285343709468) internal successors, (9808), 3084 states have internal predecessors, (9808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:20,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3085 states to 3085 states and 9808 transitions. [2021-06-05 14:08:20,125 INFO L78 Accepts]: Start accepts. Automaton has 3085 states and 9808 transitions. Word has length 19 [2021-06-05 14:08:20,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:20,125 INFO L482 AbstractCegarLoop]: Abstraction has 3085 states and 9808 transitions. [2021-06-05 14:08:20,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:20,126 INFO L276 IsEmpty]: Start isEmpty. Operand 3085 states and 9808 transitions. [2021-06-05 14:08:20,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:08:20,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:20,129 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:20,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31804,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:20,349 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:20,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:20,349 INFO L82 PathProgramCache]: Analyzing trace with hash 57519999, now seen corresponding path program 240 times [2021-06-05 14:08:20,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:20,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740904702] [2021-06-05 14:08:20,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:20,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:20,495 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:20,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:20,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740904702] [2021-06-05 14:08:20,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740904702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:20,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470487562] [2021-06-05 14:08:20,496 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 14:08:20,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:08:20,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:20,530 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 14:08:20,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:21,058 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:08:21,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:08:21,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 37 treesize of output 252 [2021-06-05 14:08:21,747 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 203 [2021-06-05 14:08:22,467 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 219 [2021-06-05 14:08:22,588 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 219 [2021-06-05 14:08:22,723 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 224 [2021-06-05 14:08:23,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 14:08:23,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:08:23,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-06-05 14:08:23,965 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:08:23,986 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-06-05 14:08:23,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:08:23,987 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:18 [2021-06-05 14:08:24,023 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:24,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470487562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:24,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:24,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:08:24,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960138055] [2021-06-05 14:08:24,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:08:24,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:24,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:08:24,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:08:24,024 INFO L87 Difference]: Start difference. First operand 3085 states and 9808 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:25,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:25,225 INFO L93 Difference]: Finished difference Result 3146 states and 9913 transitions. [2021-06-05 14:08:25,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:08:25,226 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 14:08:25,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:25,230 INFO L225 Difference]: With dead ends: 3146 [2021-06-05 14:08:25,231 INFO L226 Difference]: Without dead ends: 3136 [2021-06-05 14:08:25,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1444.1ms TimeCoverageRelationStatistics Valid=347, Invalid=1633, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 14:08:25,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3136 states. [2021-06-05 14:08:25,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3136 to 3087. [2021-06-05 14:08:25,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3087 states, 3086 states have (on average 3.179196370706416) internal successors, (9811), 3086 states have internal predecessors, (9811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:25,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3087 states to 3087 states and 9811 transitions. [2021-06-05 14:08:25,280 INFO L78 Accepts]: Start accepts. Automaton has 3087 states and 9811 transitions. Word has length 19 [2021-06-05 14:08:25,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:25,280 INFO L482 AbstractCegarLoop]: Abstraction has 3087 states and 9811 transitions. [2021-06-05 14:08:25,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:25,280 INFO L276 IsEmpty]: Start isEmpty. Operand 3087 states and 9811 transitions. [2021-06-05 14:08:25,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:08:25,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:25,283 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:25,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31805,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:25,489 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:25,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:25,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1871514008, now seen corresponding path program 241 times [2021-06-05 14:08:25,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:25,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757564168] [2021-06-05 14:08:25,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:25,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:25,552 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:25,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:25,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757564168] [2021-06-05 14:08:25,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757564168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:25,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487834855] [2021-06-05 14:08:25,553 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 14:08:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:25,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:08:25,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:25,627 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:25,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487834855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:25,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:25,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:08:25,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870832003] [2021-06-05 14:08:25,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:08:25,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:25,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:08:25,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:08:25,628 INFO L87 Difference]: Start difference. First operand 3087 states and 9811 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:25,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:25,922 INFO L93 Difference]: Finished difference Result 3398 states and 10507 transitions. [2021-06-05 14:08:25,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:08:25,923 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 14:08:25,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:25,927 INFO L225 Difference]: With dead ends: 3398 [2021-06-05 14:08:25,927 INFO L226 Difference]: Without dead ends: 3398 [2021-06-05 14:08:25,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 196.5ms TimeCoverageRelationStatistics Valid=256, Invalid=500, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:08:25,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3398 states. [2021-06-05 14:08:25,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3398 to 3101. [2021-06-05 14:08:25,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3101 states, 3100 states have (on average 3.1783870967741934) internal successors, (9853), 3100 states have internal predecessors, (9853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:25,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3101 states to 3101 states and 9853 transitions. [2021-06-05 14:08:25,972 INFO L78 Accepts]: Start accepts. Automaton has 3101 states and 9853 transitions. Word has length 19 [2021-06-05 14:08:25,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:25,972 INFO L482 AbstractCegarLoop]: Abstraction has 3101 states and 9853 transitions. [2021-06-05 14:08:25,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:25,972 INFO L276 IsEmpty]: Start isEmpty. Operand 3101 states and 9853 transitions. [2021-06-05 14:08:25,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:08:25,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:25,975 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:26,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32229,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:26,198 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:26,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:26,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1968008967, now seen corresponding path program 242 times [2021-06-05 14:08:26,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:26,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958245121] [2021-06-05 14:08:26,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:26,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:26,374 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:26,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:26,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958245121] [2021-06-05 14:08:26,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958245121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:26,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756198530] [2021-06-05 14:08:26,374 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 14:08:26,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:08:26,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:26,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:08:26,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:26,850 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:08:26,851 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:08:26,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:08:27,820 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 204 [2021-06-05 14:08:28,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:08:28,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:08:28,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:08:28,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:08:28,857 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:28,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756198530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:28,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:28,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:08:28,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138209523] [2021-06-05 14:08:28,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:08:28,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:28,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:08:28,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:08:28,859 INFO L87 Difference]: Start difference. First operand 3101 states and 9853 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 14:08:29,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:29,380 INFO L93 Difference]: Finished difference Result 3193 states and 10066 transitions. [2021-06-05 14:08:29,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:08:29,381 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 20 [2021-06-05 14:08:29,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:29,384 INFO L225 Difference]: With dead ends: 3193 [2021-06-05 14:08:29,385 INFO L226 Difference]: Without dead ends: 3182 [2021-06-05 14:08:29,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 529.6ms TimeCoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:08:29,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2021-06-05 14:08:29,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 3124. [2021-06-05 14:08:29,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3124 states, 3123 states have (on average 3.1777137367915467) internal successors, (9924), 3123 states have internal predecessors, (9924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:29,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3124 states to 3124 states and 9924 transitions. [2021-06-05 14:08:29,430 INFO L78 Accepts]: Start accepts. Automaton has 3124 states and 9924 transitions. Word has length 20 [2021-06-05 14:08:29,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:29,430 INFO L482 AbstractCegarLoop]: Abstraction has 3124 states and 9924 transitions. [2021-06-05 14:08:29,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 14:08:29,430 INFO L276 IsEmpty]: Start isEmpty. Operand 3124 states and 9924 transitions. [2021-06-05 14:08:29,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:08:29,433 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:29,433 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:29,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32230,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:29,643 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:29,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:29,644 INFO L82 PathProgramCache]: Analyzing trace with hash -750369269, now seen corresponding path program 243 times [2021-06-05 14:08:29,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:29,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72025564] [2021-06-05 14:08:29,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:29,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:29,756 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:29,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:29,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72025564] [2021-06-05 14:08:29,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72025564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:29,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177767234] [2021-06-05 14:08:29,756 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 14:08:29,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:08:29,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:29,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:08:29,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:30,189 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:08:30,189 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:08:30,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:08:32,020 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 217 [2021-06-05 14:08:32,165 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 238 [2021-06-05 14:08:32,445 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 439 DAG size of output: 326 [2021-06-05 14:08:32,726 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 439 DAG size of output: 326 [2021-06-05 14:08:33,064 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 331 [2021-06-05 14:08:33,493 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 404 [2021-06-05 14:08:34,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:08:34,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:08:34,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:08:34,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:08:34,459 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:34,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177767234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:34,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:34,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:08:34,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008808030] [2021-06-05 14:08:34,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:08:34,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:34,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:08:34,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:08:34,460 INFO L87 Difference]: Start difference. First operand 3124 states and 9924 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:34,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:34,976 INFO L93 Difference]: Finished difference Result 3211 states and 10096 transitions. [2021-06-05 14:08:34,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:08:34,976 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:08:34,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:34,980 INFO L225 Difference]: With dead ends: 3211 [2021-06-05 14:08:34,980 INFO L226 Difference]: Without dead ends: 3206 [2021-06-05 14:08:34,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 473.1ms TimeCoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:08:34,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3206 states. [2021-06-05 14:08:35,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3206 to 3124. [2021-06-05 14:08:35,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3124 states, 3123 states have (on average 3.1777137367915467) internal successors, (9924), 3123 states have internal predecessors, (9924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:35,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3124 states to 3124 states and 9924 transitions. [2021-06-05 14:08:35,016 INFO L78 Accepts]: Start accepts. Automaton has 3124 states and 9924 transitions. Word has length 20 [2021-06-05 14:08:35,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:35,016 INFO L482 AbstractCegarLoop]: Abstraction has 3124 states and 9924 transitions. [2021-06-05 14:08:35,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:35,016 INFO L276 IsEmpty]: Start isEmpty. Operand 3124 states and 9924 transitions. [2021-06-05 14:08:35,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:08:35,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:35,019 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:35,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32498 [2021-06-05 14:08:35,222 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:35,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:35,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1411633052, now seen corresponding path program 244 times [2021-06-05 14:08:35,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:35,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886615050] [2021-06-05 14:08:35,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:35,323 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:35,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:35,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886615050] [2021-06-05 14:08:35,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886615050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:35,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477635606] [2021-06-05 14:08:35,327 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 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 14:08:35,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:08:35,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:35,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:08:35,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:35,420 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:35,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477635606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:35,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:35,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:08:35,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102514997] [2021-06-05 14:08:35,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:08:35,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:35,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:08:35,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:08:35,421 INFO L87 Difference]: Start difference. First operand 3124 states and 9924 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:35,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:35,527 INFO L93 Difference]: Finished difference Result 3606 states and 10977 transitions. [2021-06-05 14:08:35,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:08:35,529 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:08:35,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:35,534 INFO L225 Difference]: With dead ends: 3606 [2021-06-05 14:08:35,534 INFO L226 Difference]: Without dead ends: 3606 [2021-06-05 14:08:35,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:08:35,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3606 states. [2021-06-05 14:08:35,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3606 to 3155. [2021-06-05 14:08:35,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3155 states, 3154 states have (on average 3.182625237793278) internal successors, (10038), 3154 states have internal predecessors, (10038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:35,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3155 states to 3155 states and 10038 transitions. [2021-06-05 14:08:35,588 INFO L78 Accepts]: Start accepts. Automaton has 3155 states and 10038 transitions. Word has length 20 [2021-06-05 14:08:35,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:35,588 INFO L482 AbstractCegarLoop]: Abstraction has 3155 states and 10038 transitions. [2021-06-05 14:08:35,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:35,588 INFO L276 IsEmpty]: Start isEmpty. Operand 3155 states and 10038 transitions. [2021-06-05 14:08:35,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:08:35,592 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:35,592 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:35,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32792 [2021-06-05 14:08:35,815 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:35,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:35,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1981379847, now seen corresponding path program 245 times [2021-06-05 14:08:35,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:35,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685511162] [2021-06-05 14:08:35,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:35,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:35,931 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:35,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:35,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685511162] [2021-06-05 14:08:35,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685511162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:35,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567037855] [2021-06-05 14:08:35,931 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 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 14:08:35,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:08:35,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:35,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:08:35,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:36,406 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:08:36,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:08:36,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:08:37,114 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 271 [2021-06-05 14:08:37,255 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 271 [2021-06-05 14:08:37,429 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 282 [2021-06-05 14:08:37,572 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 294 [2021-06-05 14:08:37,808 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 280 [2021-06-05 14:08:38,003 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 276 [2021-06-05 14:08:38,506 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 352 [2021-06-05 14:08:38,627 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 214 [2021-06-05 14:08:38,762 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 189 [2021-06-05 14:08:39,924 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 241 [2021-06-05 14:08:40,134 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 315 [2021-06-05 14:08:40,377 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 671 DAG size of output: 356 [2021-06-05 14:08:40,625 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 699 DAG size of output: 367 [2021-06-05 14:08:40,946 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 732 DAG size of output: 386 [2021-06-05 14:08:41,267 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 732 DAG size of output: 386 [2021-06-05 14:08:41,605 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 737 DAG size of output: 391 [2021-06-05 14:08:41,854 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 330 [2021-06-05 14:08:42,072 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 187 [2021-06-05 14:08:42,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:08:42,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:08:42,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:08:42,338 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:08:42,342 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:42,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567037855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:42,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:42,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:08:42,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494876667] [2021-06-05 14:08:42,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:08:42,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:42,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:08:42,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:08:42,343 INFO L87 Difference]: Start difference. First operand 3155 states and 10038 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 14:08:42,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:42,800 INFO L93 Difference]: Finished difference Result 3260 states and 10216 transitions. [2021-06-05 14:08:42,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:08:42,801 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 20 [2021-06-05 14:08:42,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:42,805 INFO L225 Difference]: With dead ends: 3260 [2021-06-05 14:08:42,805 INFO L226 Difference]: Without dead ends: 3251 [2021-06-05 14:08:42,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 418.3ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:08:42,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3251 states. [2021-06-05 14:08:42,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3251 to 3158. [2021-06-05 14:08:42,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3158 states, 3157 states have (on average 3.1821349382324993) internal successors, (10046), 3157 states have internal predecessors, (10046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:42,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3158 states to 3158 states and 10046 transitions. [2021-06-05 14:08:42,849 INFO L78 Accepts]: Start accepts. Automaton has 3158 states and 10046 transitions. Word has length 20 [2021-06-05 14:08:42,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:42,849 INFO L482 AbstractCegarLoop]: Abstraction has 3158 states and 10046 transitions. [2021-06-05 14:08:42,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 14:08:42,849 INFO L276 IsEmpty]: Start isEmpty. Operand 3158 states and 10046 transitions. [2021-06-05 14:08:42,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:08:42,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:42,852 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:43,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32793,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:43,073 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:43,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:43,073 INFO L82 PathProgramCache]: Analyzing trace with hash 853983754, now seen corresponding path program 246 times [2021-06-05 14:08:43,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:43,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144262059] [2021-06-05 14:08:43,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:43,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:43,134 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:43,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:43,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144262059] [2021-06-05 14:08:43,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144262059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:43,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378344026] [2021-06-05 14:08:43,134 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 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 14:08:43,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:08:43,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:43,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:08:43,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:43,271 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:43,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378344026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:43,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:43,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:08:43,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123370848] [2021-06-05 14:08:43,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:08:43,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:43,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:08:43,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:08:43,273 INFO L87 Difference]: Start difference. First operand 3158 states and 10046 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:43,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:43,399 INFO L93 Difference]: Finished difference Result 3782 states and 11476 transitions. [2021-06-05 14:08:43,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:08:43,400 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:08:43,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:43,405 INFO L225 Difference]: With dead ends: 3782 [2021-06-05 14:08:43,406 INFO L226 Difference]: Without dead ends: 3782 [2021-06-05 14:08:43,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 71.7ms TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:08:43,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3782 states. [2021-06-05 14:08:43,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3782 to 3158. [2021-06-05 14:08:43,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3158 states, 3157 states have (on average 3.1821349382324993) internal successors, (10046), 3157 states have internal predecessors, (10046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:43,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3158 states to 3158 states and 10046 transitions. [2021-06-05 14:08:43,456 INFO L78 Accepts]: Start accepts. Automaton has 3158 states and 10046 transitions. Word has length 20 [2021-06-05 14:08:43,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:43,456 INFO L482 AbstractCegarLoop]: Abstraction has 3158 states and 10046 transitions. [2021-06-05 14:08:43,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:43,457 INFO L276 IsEmpty]: Start isEmpty. Operand 3158 states and 10046 transitions. [2021-06-05 14:08:43,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:08:43,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:43,459 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:43,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33222 [2021-06-05 14:08:43,660 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:43,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:43,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1336798777, now seen corresponding path program 247 times [2021-06-05 14:08:43,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:43,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650583248] [2021-06-05 14:08:43,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:43,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:43,816 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:43,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:43,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650583248] [2021-06-05 14:08:43,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650583248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:43,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975159852] [2021-06-05 14:08:43,817 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 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 14:08:43,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:43,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:08:43,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:44,265 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:08:44,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:08:44,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:08:44,812 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 238 [2021-06-05 14:08:45,302 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 209 [2021-06-05 14:08:45,522 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 358 [2021-06-05 14:08:45,737 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 358 [2021-06-05 14:08:46,006 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 370 [2021-06-05 14:08:46,340 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 413 [2021-06-05 14:08:47,063 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 224 [2021-06-05 14:08:47,306 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 372 [2021-06-05 14:08:47,818 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 245 [2021-06-05 14:08:48,350 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 325 [2021-06-05 14:08:48,608 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 402 [2021-06-05 14:08:49,044 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 637 DAG size of output: 503 [2021-06-05 14:08:49,476 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 637 DAG size of output: 503 [2021-06-05 14:08:50,085 WARN L205 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 644 DAG size of output: 521 [2021-06-05 14:08:50,655 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 412 [2021-06-05 14:08:50,855 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 350 [2021-06-05 14:08:51,026 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 268 [2021-06-05 14:08:51,677 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 207 [2021-06-05 14:08:51,827 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 468 DAG size of output: 223 [2021-06-05 14:08:51,970 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 468 DAG size of output: 223 [2021-06-05 14:08:52,137 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 474 DAG size of output: 229 [2021-06-05 14:08:52,251 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 217 [2021-06-05 14:08:52,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:08:52,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:08:52,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:08:52,685 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:08:52,690 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:52,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975159852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:52,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:52,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:08:52,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908349014] [2021-06-05 14:08:52,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:08:52,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:52,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:08:52,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:08:52,691 INFO L87 Difference]: Start difference. First operand 3158 states and 10046 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 14:08:53,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:53,125 INFO L93 Difference]: Finished difference Result 3264 states and 10240 transitions. [2021-06-05 14:08:53,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:08:53,125 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 20 [2021-06-05 14:08:53,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:53,130 INFO L225 Difference]: With dead ends: 3264 [2021-06-05 14:08:53,131 INFO L226 Difference]: Without dead ends: 3257 [2021-06-05 14:08:53,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 419.5ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:08:53,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3257 states. [2021-06-05 14:08:53,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3257 to 3161. [2021-06-05 14:08:53,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3161 states, 3160 states have (on average 3.1825949367088606) internal successors, (10057), 3160 states have internal predecessors, (10057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:53,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3161 states to 3161 states and 10057 transitions. [2021-06-05 14:08:53,180 INFO L78 Accepts]: Start accepts. Automaton has 3161 states and 10057 transitions. Word has length 20 [2021-06-05 14:08:53,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:53,181 INFO L482 AbstractCegarLoop]: Abstraction has 3161 states and 10057 transitions. [2021-06-05 14:08:53,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 14:08:53,181 INFO L276 IsEmpty]: Start isEmpty. Operand 3161 states and 10057 transitions. [2021-06-05 14:08:53,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:08:53,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:53,184 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:53,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33223,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:53,403 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:53,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:53,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1830772426, now seen corresponding path program 248 times [2021-06-05 14:08:53,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:53,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843722769] [2021-06-05 14:08:53,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:53,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:53,456 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:53,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:53,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843722769] [2021-06-05 14:08:53,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843722769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:53,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905395964] [2021-06-05 14:08:53,457 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 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 14:08:53,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:08:53,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:53,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:08:53,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:53,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905395964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:53,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:53,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:08:53,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343675709] [2021-06-05 14:08:53,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:08:53,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:53,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:08:53,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:08:53,549 INFO L87 Difference]: Start difference. First operand 3161 states and 10057 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:53,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:53,642 INFO L93 Difference]: Finished difference Result 3795 states and 11521 transitions. [2021-06-05 14:08:53,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:08:53,643 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:08:53,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:53,647 INFO L225 Difference]: With dead ends: 3795 [2021-06-05 14:08:53,647 INFO L226 Difference]: Without dead ends: 3795 [2021-06-05 14:08:53,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 65.9ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:08:53,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3795 states. [2021-06-05 14:08:53,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3795 to 3140. [2021-06-05 14:08:53,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3140 states, 3139 states have (on average 3.1815864925135395) internal successors, (9987), 3139 states have internal predecessors, (9987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:53,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 9987 transitions. [2021-06-05 14:08:53,697 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 9987 transitions. Word has length 20 [2021-06-05 14:08:53,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:53,697 INFO L482 AbstractCegarLoop]: Abstraction has 3140 states and 9987 transitions. [2021-06-05 14:08:53,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:53,697 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 9987 transitions. [2021-06-05 14:08:53,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:08:53,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:53,700 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:53,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33619 [2021-06-05 14:08:53,921 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:53,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:53,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1926339292, now seen corresponding path program 249 times [2021-06-05 14:08:53,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:53,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330562495] [2021-06-05 14:08:53,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:53,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:53,976 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:53,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:53,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330562495] [2021-06-05 14:08:53,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330562495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:53,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554234246] [2021-06-05 14:08:53,976 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 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 14:08:54,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:08:54,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:54,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:08:54,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:54,056 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:54,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554234246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:54,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:54,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:08:54,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910575278] [2021-06-05 14:08:54,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:08:54,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:54,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:08:54,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:08:54,057 INFO L87 Difference]: Start difference. First operand 3140 states and 9987 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:54,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:54,192 INFO L93 Difference]: Finished difference Result 4051 states and 12203 transitions. [2021-06-05 14:08:54,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:08:54,193 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:08:54,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:54,198 INFO L225 Difference]: With dead ends: 4051 [2021-06-05 14:08:54,198 INFO L226 Difference]: Without dead ends: 4051 [2021-06-05 14:08:54,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:08:54,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-06-05 14:08:54,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 3009. [2021-06-05 14:08:54,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3009 states, 3008 states have (on average 3.171542553191489) internal successors, (9540), 3008 states have internal predecessors, (9540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:54,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3009 states to 3009 states and 9540 transitions. [2021-06-05 14:08:54,248 INFO L78 Accepts]: Start accepts. Automaton has 3009 states and 9540 transitions. Word has length 20 [2021-06-05 14:08:54,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:54,249 INFO L482 AbstractCegarLoop]: Abstraction has 3009 states and 9540 transitions. [2021-06-05 14:08:54,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:54,249 INFO L276 IsEmpty]: Start isEmpty. Operand 3009 states and 9540 transitions. [2021-06-05 14:08:54,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:08:54,251 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:54,251 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:54,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33620 [2021-06-05 14:08:54,475 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:54,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:54,475 INFO L82 PathProgramCache]: Analyzing trace with hash -393864147, now seen corresponding path program 250 times [2021-06-05 14:08:54,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:54,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349370441] [2021-06-05 14:08:54,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:54,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:54,566 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:08:54,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:54,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349370441] [2021-06-05 14:08:54,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349370441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:54,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000516800] [2021-06-05 14:08:54,566 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 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 14:08:54,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:08:54,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:54,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:08:54,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:55,038 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:08:55,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:08:55,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:08:56,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:08:56,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:08:56,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:08:56,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:08:56,335 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:56,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000516800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:56,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:56,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:08:56,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701506954] [2021-06-05 14:08:56,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:08:56,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:56,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:08:56,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:08:56,336 INFO L87 Difference]: Start difference. First operand 3009 states and 9540 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:57,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:57,038 INFO L93 Difference]: Finished difference Result 3118 states and 9737 transitions. [2021-06-05 14:08:57,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:08:57,038 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:08:57,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:57,042 INFO L225 Difference]: With dead ends: 3118 [2021-06-05 14:08:57,042 INFO L226 Difference]: Without dead ends: 3095 [2021-06-05 14:08:57,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 531.8ms TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:08:57,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3095 states. [2021-06-05 14:08:57,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3095 to 3011. [2021-06-05 14:08:57,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3011 states, 3010 states have (on average 3.167441860465116) internal successors, (9534), 3010 states have internal predecessors, (9534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:57,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3011 states to 3011 states and 9534 transitions. [2021-06-05 14:08:57,083 INFO L78 Accepts]: Start accepts. Automaton has 3011 states and 9534 transitions. Word has length 20 [2021-06-05 14:08:57,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:57,084 INFO L482 AbstractCegarLoop]: Abstraction has 3011 states and 9534 transitions. [2021-06-05 14:08:57,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:57,084 INFO L276 IsEmpty]: Start isEmpty. Operand 3011 states and 9534 transitions. [2021-06-05 14:08:57,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:08:57,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:57,086 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:57,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33621 [2021-06-05 14:08:57,309 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:57,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:57,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1511860465, now seen corresponding path program 251 times [2021-06-05 14:08:57,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:57,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846473418] [2021-06-05 14:08:57,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:57,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:57,402 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:08:57,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:57,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846473418] [2021-06-05 14:08:57,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846473418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:57,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797960487] [2021-06-05 14:08:57,402 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 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 14:08:57,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:08:57,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:57,436 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 14:08:57,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:57,869 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:08:57,869 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:08:57,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:08:59,300 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 203 [2021-06-05 14:08:59,483 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 252 [2021-06-05 14:08:59,666 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 252 [2021-06-05 14:08:59,871 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 258 [2021-06-05 14:09:01,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:09:01,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:09:01,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:09:01,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:09:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:01,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797960487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:01,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:01,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:09:01,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855642661] [2021-06-05 14:09:01,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:09:01,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:01,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:09:01,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:09:01,109 INFO L87 Difference]: Start difference. First operand 3011 states and 9534 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:01,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:01,485 INFO L93 Difference]: Finished difference Result 3095 states and 9704 transitions. [2021-06-05 14:09:01,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:09:01,485 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:09:01,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:01,489 INFO L225 Difference]: With dead ends: 3095 [2021-06-05 14:09:01,489 INFO L226 Difference]: Without dead ends: 3090 [2021-06-05 14:09:01,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 401.0ms TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:09:01,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3090 states. [2021-06-05 14:09:01,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3090 to 3011. [2021-06-05 14:09:01,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3011 states, 3010 states have (on average 3.167441860465116) internal successors, (9534), 3010 states have internal predecessors, (9534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:01,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3011 states to 3011 states and 9534 transitions. [2021-06-05 14:09:01,533 INFO L78 Accepts]: Start accepts. Automaton has 3011 states and 9534 transitions. Word has length 20 [2021-06-05 14:09:01,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:01,533 INFO L482 AbstractCegarLoop]: Abstraction has 3011 states and 9534 transitions. [2021-06-05 14:09:01,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:01,533 INFO L276 IsEmpty]: Start isEmpty. Operand 3011 states and 9534 transitions. [2021-06-05 14:09:01,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:09:01,536 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:01,536 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:01,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33775 [2021-06-05 14:09:01,759 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:01,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:01,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1121121017, now seen corresponding path program 252 times [2021-06-05 14:09:01,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:01,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31594511] [2021-06-05 14:09:01,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:01,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:01,911 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:01,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:01,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31594511] [2021-06-05 14:09:01,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31594511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:01,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629090692] [2021-06-05 14:09:01,912 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 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 14:09:01,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:09:01,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:01,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:09:01,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:02,371 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:09:02,371 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:09:02,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:09:03,162 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 266 [2021-06-05 14:09:03,396 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 277 [2021-06-05 14:09:03,574 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 277 [2021-06-05 14:09:03,786 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 288 [2021-06-05 14:09:04,270 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 369 [2021-06-05 14:09:04,809 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 332 [2021-06-05 14:09:04,976 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 269 [2021-06-05 14:09:05,594 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 203 [2021-06-05 14:09:05,853 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 469 DAG size of output: 243 [2021-06-05 14:09:06,069 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 310 [2021-06-05 14:09:06,354 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 329 [2021-06-05 14:09:07,239 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 231 [2021-06-05 14:09:07,377 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 257 [2021-06-05 14:09:07,588 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 463 DAG size of output: 332 [2021-06-05 14:09:08,049 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 612 DAG size of output: 469 [2021-06-05 14:09:08,734 WARN L205 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 1046 DAG size of output: 554 [2021-06-05 14:09:09,450 WARN L205 SmtUtils]: Spent 711.00 ms on a formula simplification. DAG size of input: 1046 DAG size of output: 554 [2021-06-05 14:09:10,213 WARN L205 SmtUtils]: Spent 760.00 ms on a formula simplification. DAG size of input: 1053 DAG size of output: 561 [2021-06-05 14:09:10,463 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 305 [2021-06-05 14:09:11,010 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 341 [2021-06-05 14:09:11,171 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 250 [2021-06-05 14:09:11,482 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 221 [2021-06-05 14:09:11,611 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 244 [2021-06-05 14:09:11,741 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 244 [2021-06-05 14:09:11,884 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 171 [2021-06-05 14:09:12,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:09:12,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:09:12,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:09:12,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:09:12,088 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:12,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629090692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:12,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:12,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:09:12,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188926552] [2021-06-05 14:09:12,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:09:12,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:12,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:09:12,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:09:12,089 INFO L87 Difference]: Start difference. First operand 3011 states and 9534 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 14:09:12,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:12,544 INFO L93 Difference]: Finished difference Result 3110 states and 9713 transitions. [2021-06-05 14:09:12,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:09:12,544 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 20 [2021-06-05 14:09:12,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:12,548 INFO L225 Difference]: With dead ends: 3110 [2021-06-05 14:09:12,548 INFO L226 Difference]: Without dead ends: 3101 [2021-06-05 14:09:12,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 481.7ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:09:12,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3101 states. [2021-06-05 14:09:12,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3101 to 3010. [2021-06-05 14:09:12,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3009 states have (on average 3.1665004985044867) internal successors, (9528), 3009 states have internal predecessors, (9528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:12,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 9528 transitions. [2021-06-05 14:09:12,588 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 9528 transitions. Word has length 20 [2021-06-05 14:09:12,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:12,588 INFO L482 AbstractCegarLoop]: Abstraction has 3010 states and 9528 transitions. [2021-06-05 14:09:12,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 14:09:12,588 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 9528 transitions. [2021-06-05 14:09:12,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:09:12,590 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:12,590 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:12,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34134 [2021-06-05 14:09:12,813 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:12,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:12,813 INFO L82 PathProgramCache]: Analyzing trace with hash -187657308, now seen corresponding path program 253 times [2021-06-05 14:09:12,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:12,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948786240] [2021-06-05 14:09:12,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:12,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:12,865 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:09:12,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:12,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948786240] [2021-06-05 14:09:12,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948786240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:12,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354684997] [2021-06-05 14:09:12,865 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 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 14:09:12,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:12,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:09:12,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:12,933 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:09:12,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354684997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:12,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:12,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:09:12,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715197997] [2021-06-05 14:09:12,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:09:12,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:12,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:09:12,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:09:12,934 INFO L87 Difference]: Start difference. First operand 3010 states and 9528 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:13,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:13,011 INFO L93 Difference]: Finished difference Result 3282 states and 10018 transitions. [2021-06-05 14:09:13,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:09:13,012 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:09:13,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:13,016 INFO L225 Difference]: With dead ends: 3282 [2021-06-05 14:09:13,016 INFO L226 Difference]: Without dead ends: 3282 [2021-06-05 14:09:13,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:09:13,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3282 states. [2021-06-05 14:09:13,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3282 to 3032. [2021-06-05 14:09:13,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3032 states, 3031 states have (on average 3.167601451666117) internal successors, (9601), 3031 states have internal predecessors, (9601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:13,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3032 states to 3032 states and 9601 transitions. [2021-06-05 14:09:13,057 INFO L78 Accepts]: Start accepts. Automaton has 3032 states and 9601 transitions. Word has length 20 [2021-06-05 14:09:13,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:13,057 INFO L482 AbstractCegarLoop]: Abstraction has 3032 states and 9601 transitions. [2021-06-05 14:09:13,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:13,058 INFO L276 IsEmpty]: Start isEmpty. Operand 3032 states and 9601 transitions. [2021-06-05 14:09:13,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:09:13,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:13,060 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:13,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34552,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:13,282 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:13,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:13,282 INFO L82 PathProgramCache]: Analyzing trace with hash 2046450186, now seen corresponding path program 254 times [2021-06-05 14:09:13,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:13,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277698401] [2021-06-05 14:09:13,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:13,337 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:13,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:13,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277698401] [2021-06-05 14:09:13,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277698401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:13,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077503155] [2021-06-05 14:09:13,337 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 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 14:09:13,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:09:13,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:13,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:09:13,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:13,407 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:13,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077503155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:13,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:13,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:09:13,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991271265] [2021-06-05 14:09:13,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:09:13,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:13,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:09:13,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:09:13,408 INFO L87 Difference]: Start difference. First operand 3032 states and 9601 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:13,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:13,507 INFO L93 Difference]: Finished difference Result 3444 states and 10441 transitions. [2021-06-05 14:09:13,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:09:13,508 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:09:13,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:13,513 INFO L225 Difference]: With dead ends: 3444 [2021-06-05 14:09:13,513 INFO L226 Difference]: Without dead ends: 3444 [2021-06-05 14:09:13,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:09:13,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3444 states. [2021-06-05 14:09:13,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3444 to 3015. [2021-06-05 14:09:13,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3015 states, 3014 states have (on average 3.1648971466489715) internal successors, (9539), 3014 states have internal predecessors, (9539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:13,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3015 states to 3015 states and 9539 transitions. [2021-06-05 14:09:13,560 INFO L78 Accepts]: Start accepts. Automaton has 3015 states and 9539 transitions. Word has length 20 [2021-06-05 14:09:13,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:13,560 INFO L482 AbstractCegarLoop]: Abstraction has 3015 states and 9539 transitions. [2021-06-05 14:09:13,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:13,560 INFO L276 IsEmpty]: Start isEmpty. Operand 3015 states and 9539 transitions. [2021-06-05 14:09:13,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:09:13,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:13,563 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:13,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34553 [2021-06-05 14:09:13,764 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:13,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:13,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1710661532, now seen corresponding path program 255 times [2021-06-05 14:09:13,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:13,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57088205] [2021-06-05 14:09:13,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:13,818 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:13,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:13,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57088205] [2021-06-05 14:09:13,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57088205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:13,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187085290] [2021-06-05 14:09:13,818 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 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 14:09:13,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:09:13,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:13,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:09:13,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:13,897 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:13,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187085290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:13,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:13,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:09:13,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62622777] [2021-06-05 14:09:13,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:09:13,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:13,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:09:13,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:09:13,898 INFO L87 Difference]: Start difference. First operand 3015 states and 9539 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:14,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:14,027 INFO L93 Difference]: Finished difference Result 3807 states and 11446 transitions. [2021-06-05 14:09:14,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:09:14,028 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:09:14,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:14,032 INFO L225 Difference]: With dead ends: 3807 [2021-06-05 14:09:14,032 INFO L226 Difference]: Without dead ends: 3807 [2021-06-05 14:09:14,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 99.2ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:09:14,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3807 states. [2021-06-05 14:09:14,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3807 to 2940. [2021-06-05 14:09:14,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2940 states, 2939 states have (on average 3.159918339571283) internal successors, (9287), 2939 states have internal predecessors, (9287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:14,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2940 states to 2940 states and 9287 transitions. [2021-06-05 14:09:14,074 INFO L78 Accepts]: Start accepts. Automaton has 2940 states and 9287 transitions. Word has length 20 [2021-06-05 14:09:14,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:14,074 INFO L482 AbstractCegarLoop]: Abstraction has 2940 states and 9287 transitions. [2021-06-05 14:09:14,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:14,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2940 states and 9287 transitions. [2021-06-05 14:09:14,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:09:14,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:14,077 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:14,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34554 [2021-06-05 14:09:14,283 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:14,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:14,283 INFO L82 PathProgramCache]: Analyzing trace with hash 2077959498, now seen corresponding path program 256 times [2021-06-05 14:09:14,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:14,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331612020] [2021-06-05 14:09:14,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:14,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:14,338 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:14,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:14,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331612020] [2021-06-05 14:09:14,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331612020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:14,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006311987] [2021-06-05 14:09:14,339 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 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 14:09:14,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:09:14,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:14,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:09:14,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:14,413 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:14,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006311987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:14,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:14,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:09:14,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495352670] [2021-06-05 14:09:14,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:09:14,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:14,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:09:14,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:09:14,415 INFO L87 Difference]: Start difference. First operand 2940 states and 9287 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:14,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:14,592 INFO L93 Difference]: Finished difference Result 4596 states and 14016 transitions. [2021-06-05 14:09:14,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:09:14,592 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:09:14,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:14,597 INFO L225 Difference]: With dead ends: 4596 [2021-06-05 14:09:14,598 INFO L226 Difference]: Without dead ends: 4596 [2021-06-05 14:09:14,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 129.5ms TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:09:14,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4596 states. [2021-06-05 14:09:14,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4596 to 3707. [2021-06-05 14:09:14,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3707 states, 3706 states have (on average 3.1813275769023206) internal successors, (11790), 3706 states have internal predecessors, (11790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:14,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3707 states to 3707 states and 11790 transitions. [2021-06-05 14:09:14,657 INFO L78 Accepts]: Start accepts. Automaton has 3707 states and 11790 transitions. Word has length 20 [2021-06-05 14:09:14,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:14,657 INFO L482 AbstractCegarLoop]: Abstraction has 3707 states and 11790 transitions. [2021-06-05 14:09:14,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:14,657 INFO L276 IsEmpty]: Start isEmpty. Operand 3707 states and 11790 transitions. [2021-06-05 14:09:14,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:09:14,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:14,660 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:14,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34555,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:14,883 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:14,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:14,883 INFO L82 PathProgramCache]: Analyzing trace with hash -2063705743, now seen corresponding path program 257 times [2021-06-05 14:09:14,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:14,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506652196] [2021-06-05 14:09:14,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:14,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:14,962 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:09:14,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:14,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506652196] [2021-06-05 14:09:14,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506652196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:14,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658337227] [2021-06-05 14:09:14,963 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 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 14:09:14,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:09:14,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:14,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:09:14,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:15,369 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:09:15,369 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:09:15,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:09:16,010 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 275 [2021-06-05 14:09:16,136 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 275 [2021-06-05 14:09:16,296 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 286 [2021-06-05 14:09:16,515 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 284 [2021-06-05 14:09:16,823 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 305 [2021-06-05 14:09:17,005 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 212 [2021-06-05 14:09:17,168 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 278 [2021-06-05 14:09:17,709 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 268 [2021-06-05 14:09:17,847 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 191 [2021-06-05 14:09:18,497 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 256 [2021-06-05 14:09:18,747 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 554 DAG size of output: 267 [2021-06-05 14:09:18,965 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 554 DAG size of output: 267 [2021-06-05 14:09:19,209 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 559 DAG size of output: 272 [2021-06-05 14:09:19,388 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 316 [2021-06-05 14:09:20,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:09:20,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:09:20,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:09:20,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:09:20,353 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:20,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658337227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:20,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:20,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-05 14:09:20,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900777613] [2021-06-05 14:09:20,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:09:20,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:20,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:09:20,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:09:20,354 INFO L87 Difference]: Start difference. First operand 3707 states and 11790 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:20,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:20,630 INFO L93 Difference]: Finished difference Result 3745 states and 11853 transitions. [2021-06-05 14:09:20,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:09:20,631 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:09:20,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:20,634 INFO L225 Difference]: With dead ends: 3745 [2021-06-05 14:09:20,634 INFO L226 Difference]: Without dead ends: 3721 [2021-06-05 14:09:20,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 348.9ms TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:09:20,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3721 states. [2021-06-05 14:09:20,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3721 to 3708. [2021-06-05 14:09:20,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3708 states, 3707 states have (on average 3.1810089020771515) internal successors, (11792), 3707 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 14:09:20,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3708 states to 3708 states and 11792 transitions. [2021-06-05 14:09:20,676 INFO L78 Accepts]: Start accepts. Automaton has 3708 states and 11792 transitions. Word has length 20 [2021-06-05 14:09:20,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:20,676 INFO L482 AbstractCegarLoop]: Abstraction has 3708 states and 11792 transitions. [2021-06-05 14:09:20,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:20,676 INFO L276 IsEmpty]: Start isEmpty. Operand 3708 states and 11792 transitions. [2021-06-05 14:09:20,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:09:20,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:20,678 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:20,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34556 [2021-06-05 14:09:20,879 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:20,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:20,879 INFO L82 PathProgramCache]: Analyzing trace with hash 875393611, now seen corresponding path program 258 times [2021-06-05 14:09:20,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:20,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070432397] [2021-06-05 14:09:20,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:20,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:20,955 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:09:20,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:20,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070432397] [2021-06-05 14:09:20,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070432397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:20,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35771242] [2021-06-05 14:09:20,956 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 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 14:09:20,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:09:20,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:20,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:09:20,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:21,318 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:09:21,319 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:09:21,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:09:21,811 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 267 [2021-06-05 14:09:22,243 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 329 [2021-06-05 14:09:22,353 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 262 [2021-06-05 14:09:22,588 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 293 [2021-06-05 14:09:23,431 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 237 [2021-06-05 14:09:23,580 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 281 [2021-06-05 14:09:23,827 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 581 DAG size of output: 416 [2021-06-05 14:09:24,121 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 471 [2021-06-05 14:09:24,387 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 471 [2021-06-05 14:09:24,686 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 636 DAG size of output: 476 [2021-06-05 14:09:25,041 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 478 DAG size of output: 525 [2021-06-05 14:09:25,625 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 477 [2021-06-05 14:09:26,295 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 281 [2021-06-05 14:09:26,410 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 281 [2021-06-05 14:09:26,534 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 424 DAG size of output: 283 [2021-06-05 14:09:26,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:09:26,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:09:26,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:09:26,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:09:26,843 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:26,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35771242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:26,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:26,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:09:26,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100100457] [2021-06-05 14:09:26,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:09:26,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:26,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:09:26,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:09:26,844 INFO L87 Difference]: Start difference. First operand 3708 states and 11792 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:27,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:27,393 INFO L93 Difference]: Finished difference Result 3819 states and 12002 transitions. [2021-06-05 14:09:27,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:09:27,394 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:09:27,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:27,400 INFO L225 Difference]: With dead ends: 3819 [2021-06-05 14:09:27,400 INFO L226 Difference]: Without dead ends: 3798 [2021-06-05 14:09:27,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 409.7ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:09:27,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3798 states. [2021-06-05 14:09:27,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3798 to 3706. [2021-06-05 14:09:27,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3706 states, 3705 states have (on average 3.1813765182186233) internal successors, (11787), 3705 states have internal predecessors, (11787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:27,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3706 states to 3706 states and 11787 transitions. [2021-06-05 14:09:27,463 INFO L78 Accepts]: Start accepts. Automaton has 3706 states and 11787 transitions. Word has length 20 [2021-06-05 14:09:27,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:27,463 INFO L482 AbstractCegarLoop]: Abstraction has 3706 states and 11787 transitions. [2021-06-05 14:09:27,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:27,463 INFO L276 IsEmpty]: Start isEmpty. Operand 3706 states and 11787 transitions. [2021-06-05 14:09:27,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:09:27,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:27,467 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:27,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34845 [2021-06-05 14:09:27,681 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:27,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:27,681 INFO L82 PathProgramCache]: Analyzing trace with hash 452803937, now seen corresponding path program 259 times [2021-06-05 14:09:27,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:27,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457181772] [2021-06-05 14:09:27,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:27,759 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:27,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:27,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457181772] [2021-06-05 14:09:27,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457181772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:27,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540281458] [2021-06-05 14:09:27,759 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 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 14:09:27,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:27,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:09:27,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:28,187 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:09:28,187 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:09:28,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:09:29,100 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 218 [2021-06-05 14:09:30,059 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 253 [2021-06-05 14:09:30,698 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 205 [2021-06-05 14:09:30,800 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 211 [2021-06-05 14:09:30,951 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 408 DAG size of output: 261 [2021-06-05 14:09:31,136 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 267 [2021-06-05 14:09:31,324 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 267 [2021-06-05 14:09:31,529 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 272 [2021-06-05 14:09:31,684 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 255 [2021-06-05 14:09:31,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:09:31,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:09:31,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:09:31,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:09:31,977 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:31,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540281458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:31,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:31,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:09:31,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057059074] [2021-06-05 14:09:31,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:09:31,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:31,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:09:31,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:09:31,978 INFO L87 Difference]: Start difference. First operand 3706 states and 11787 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:32,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:32,419 INFO L93 Difference]: Finished difference Result 3787 states and 11914 transitions. [2021-06-05 14:09:32,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:09:32,419 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:09:32,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:32,423 INFO L225 Difference]: With dead ends: 3787 [2021-06-05 14:09:32,423 INFO L226 Difference]: Without dead ends: 3758 [2021-06-05 14:09:32,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 371.8ms TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:09:32,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3758 states. [2021-06-05 14:09:32,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3758 to 3704. [2021-06-05 14:09:32,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3704 states, 3703 states have (on average 3.179044018363489) internal successors, (11772), 3703 states have internal predecessors, (11772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:32,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3704 states to 3704 states and 11772 transitions. [2021-06-05 14:09:32,464 INFO L78 Accepts]: Start accepts. Automaton has 3704 states and 11772 transitions. Word has length 20 [2021-06-05 14:09:32,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:32,464 INFO L482 AbstractCegarLoop]: Abstraction has 3704 states and 11772 transitions. [2021-06-05 14:09:32,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:32,464 INFO L276 IsEmpty]: Start isEmpty. Operand 3704 states and 11772 transitions. [2021-06-05 14:09:32,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:09:32,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:32,466 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:32,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35236 [2021-06-05 14:09:32,666 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:32,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:32,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1936438747, now seen corresponding path program 260 times [2021-06-05 14:09:32,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:32,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105504322] [2021-06-05 14:09:32,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:32,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:32,756 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:32,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:32,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105504322] [2021-06-05 14:09:32,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105504322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:32,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717894702] [2021-06-05 14:09:32,757 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 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 14:09:32,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:09:32,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:32,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:09:32,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:33,126 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:09:33,126 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:09:33,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:09:33,896 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 354 [2021-06-05 14:09:34,566 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 403 [2021-06-05 14:09:35,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:09:35,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:09:35,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:09:35,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:09:35,833 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:35,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717894702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:35,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:35,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:09:35,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156984896] [2021-06-05 14:09:35,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:09:35,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:35,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:09:35,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:09:35,834 INFO L87 Difference]: Start difference. First operand 3704 states and 11772 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:36,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:36,267 INFO L93 Difference]: Finished difference Result 3820 states and 11980 transitions. [2021-06-05 14:09:36,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:09:36,269 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:09:36,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:36,274 INFO L225 Difference]: With dead ends: 3820 [2021-06-05 14:09:36,274 INFO L226 Difference]: Without dead ends: 3801 [2021-06-05 14:09:36,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 406.9ms TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:09:36,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2021-06-05 14:09:36,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 3704. [2021-06-05 14:09:36,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3704 states, 3703 states have (on average 3.177153659195247) internal successors, (11765), 3703 states have internal predecessors, (11765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:36,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3704 states to 3704 states and 11765 transitions. [2021-06-05 14:09:36,316 INFO L78 Accepts]: Start accepts. Automaton has 3704 states and 11765 transitions. Word has length 20 [2021-06-05 14:09:36,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:36,316 INFO L482 AbstractCegarLoop]: Abstraction has 3704 states and 11765 transitions. [2021-06-05 14:09:36,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:36,316 INFO L276 IsEmpty]: Start isEmpty. Operand 3704 states and 11765 transitions. [2021-06-05 14:09:36,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:09:36,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:36,318 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:36,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35601 [2021-06-05 14:09:36,519 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:36,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:36,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1306449377, now seen corresponding path program 261 times [2021-06-05 14:09:36,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:36,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491847036] [2021-06-05 14:09:36,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:36,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:36,609 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:36,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:36,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491847036] [2021-06-05 14:09:36,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491847036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:36,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546894852] [2021-06-05 14:09:36,609 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 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 14:09:36,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:09:36,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:36,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:09:36,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:36,999 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:09:37,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:09:37,777 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 315 [2021-06-05 14:09:38,639 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 281 [2021-06-05 14:09:38,777 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 274 [2021-06-05 14:09:39,766 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 252 [2021-06-05 14:09:39,982 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 552 DAG size of output: 332 [2021-06-05 14:09:40,315 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 895 DAG size of output: 442 [2021-06-05 14:09:40,670 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 895 DAG size of output: 442 [2021-06-05 14:09:41,041 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 902 DAG size of output: 449 [2021-06-05 14:09:41,564 WARN L205 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 451 DAG size of output: 432 [2021-06-05 14:09:41,812 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 229 [2021-06-05 14:09:42,785 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 288 [2021-06-05 14:09:42,911 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 512 DAG size of output: 294 [2021-06-05 14:09:43,036 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 512 DAG size of output: 294 [2021-06-05 14:09:43,169 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 517 DAG size of output: 299 [2021-06-05 14:09:43,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:09:43,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:09:43,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:09:43,300 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:09:43,305 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:43,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546894852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:43,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:43,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:09:43,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867589417] [2021-06-05 14:09:43,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:09:43,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:43,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:09:43,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:09:43,306 INFO L87 Difference]: Start difference. First operand 3704 states and 11765 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:43,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:43,631 INFO L93 Difference]: Finished difference Result 3872 states and 12169 transitions. [2021-06-05 14:09:43,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:09:43,632 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:09:43,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:43,636 INFO L225 Difference]: With dead ends: 3872 [2021-06-05 14:09:43,636 INFO L226 Difference]: Without dead ends: 3867 [2021-06-05 14:09:43,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 379.0ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:09:43,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3867 states. [2021-06-05 14:09:43,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3867 to 3704. [2021-06-05 14:09:43,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3704 states, 3703 states have (on average 3.177153659195247) internal successors, (11765), 3703 states have internal predecessors, (11765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:43,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3704 states to 3704 states and 11765 transitions. [2021-06-05 14:09:43,678 INFO L78 Accepts]: Start accepts. Automaton has 3704 states and 11765 transitions. Word has length 20 [2021-06-05 14:09:43,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:43,678 INFO L482 AbstractCegarLoop]: Abstraction has 3704 states and 11765 transitions. [2021-06-05 14:09:43,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:43,679 INFO L276 IsEmpty]: Start isEmpty. Operand 3704 states and 11765 transitions. [2021-06-05 14:09:43,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:09:43,681 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:43,681 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:43,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35895,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:43,881 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:43,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:43,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1269922247, now seen corresponding path program 262 times [2021-06-05 14:09:43,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:43,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708215527] [2021-06-05 14:09:43,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:43,976 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:43,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:43,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708215527] [2021-06-05 14:09:43,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708215527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:43,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057527600] [2021-06-05 14:09:43,977 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 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 14:09:44,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:09:44,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:44,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:09:44,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:44,321 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:09:44,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:09:45,601 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 205 [2021-06-05 14:09:45,915 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 224 [2021-06-05 14:09:46,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:09:46,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:09:46,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:09:46,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:09:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:46,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057527600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:46,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:46,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:09:46,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919890886] [2021-06-05 14:09:46,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:09:46,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:46,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:09:46,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:09:46,222 INFO L87 Difference]: Start difference. First operand 3704 states and 11765 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 14:09:46,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:46,647 INFO L93 Difference]: Finished difference Result 3769 states and 11875 transitions. [2021-06-05 14:09:46,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:09:46,647 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 20 [2021-06-05 14:09:46,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:46,651 INFO L225 Difference]: With dead ends: 3769 [2021-06-05 14:09:46,651 INFO L226 Difference]: Without dead ends: 3760 [2021-06-05 14:09:46,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 322.1ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:09:46,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3760 states. [2021-06-05 14:09:46,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3760 to 3700. [2021-06-05 14:09:46,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3700 states, 3699 states have (on average 3.176263855095972) internal successors, (11749), 3699 states have internal predecessors, (11749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:46,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3700 states to 3700 states and 11749 transitions. [2021-06-05 14:09:46,691 INFO L78 Accepts]: Start accepts. Automaton has 3700 states and 11749 transitions. Word has length 20 [2021-06-05 14:09:46,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:46,692 INFO L482 AbstractCegarLoop]: Abstraction has 3700 states and 11749 transitions. [2021-06-05 14:09:46,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 14:09:46,692 INFO L276 IsEmpty]: Start isEmpty. Operand 3700 states and 11749 transitions. [2021-06-05 14:09:46,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:09:46,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:46,694 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:46,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36523 [2021-06-05 14:09:46,894 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:46,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:46,895 INFO L82 PathProgramCache]: Analyzing trace with hash 142526154, now seen corresponding path program 263 times [2021-06-05 14:09:46,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:46,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423068044] [2021-06-05 14:09:46,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:46,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:46,936 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:09:46,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:46,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423068044] [2021-06-05 14:09:46,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423068044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:46,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302051625] [2021-06-05 14:09:46,937 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 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 14:09:46,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:09:46,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:46,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:09:46,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:47,002 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:09:47,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302051625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:47,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:47,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:09:47,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746063226] [2021-06-05 14:09:47,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:09:47,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:47,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:09:47,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:09:47,003 INFO L87 Difference]: Start difference. First operand 3700 states and 11749 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:47,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:47,068 INFO L93 Difference]: Finished difference Result 3959 states and 12236 transitions. [2021-06-05 14:09:47,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:09:47,069 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:09:47,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:47,073 INFO L225 Difference]: With dead ends: 3959 [2021-06-05 14:09:47,073 INFO L226 Difference]: Without dead ends: 3959 [2021-06-05 14:09:47,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 48.7ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:09:47,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3959 states. [2021-06-05 14:09:47,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3959 to 3733. [2021-06-05 14:09:47,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3733 states, 3732 states have (on average 3.177652733118971) internal successors, (11859), 3732 states have internal predecessors, (11859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:47,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3733 states to 3733 states and 11859 transitions. [2021-06-05 14:09:47,119 INFO L78 Accepts]: Start accepts. Automaton has 3733 states and 11859 transitions. Word has length 20 [2021-06-05 14:09:47,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:47,119 INFO L482 AbstractCegarLoop]: Abstraction has 3733 states and 11859 transitions. [2021-06-05 14:09:47,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:47,119 INFO L276 IsEmpty]: Start isEmpty. Operand 3733 states and 11859 transitions. [2021-06-05 14:09:47,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:09:47,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:47,122 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:47,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36817,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:47,322 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:47,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:47,322 INFO L82 PathProgramCache]: Analyzing trace with hash 680381732, now seen corresponding path program 264 times [2021-06-05 14:09:47,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:47,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716485762] [2021-06-05 14:09:47,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:47,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:47,370 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:47,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:47,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716485762] [2021-06-05 14:09:47,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716485762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:47,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968116629] [2021-06-05 14:09:47,370 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 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 14:09:47,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:09:47,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:47,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:09:47,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:47,429 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:47,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968116629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:47,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:47,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:09:47,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92086727] [2021-06-05 14:09:47,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:09:47,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:47,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:09:47,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:09:47,430 INFO L87 Difference]: Start difference. First operand 3733 states and 11859 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:47,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:47,529 INFO L93 Difference]: Finished difference Result 4198 states and 12875 transitions. [2021-06-05 14:09:47,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:09:47,529 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:09:47,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:47,534 INFO L225 Difference]: With dead ends: 4198 [2021-06-05 14:09:47,534 INFO L226 Difference]: Without dead ends: 4198 [2021-06-05 14:09:47,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:09:47,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4198 states. [2021-06-05 14:09:47,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4198 to 3725. [2021-06-05 14:09:47,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3725 states, 3724 states have (on average 3.1766917293233083) internal successors, (11830), 3724 states have internal predecessors, (11830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:47,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3725 states to 3725 states and 11830 transitions. [2021-06-05 14:09:47,581 INFO L78 Accepts]: Start accepts. Automaton has 3725 states and 11830 transitions. Word has length 20 [2021-06-05 14:09:47,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:47,581 INFO L482 AbstractCegarLoop]: Abstraction has 3725 states and 11830 transitions. [2021-06-05 14:09:47,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:47,581 INFO L276 IsEmpty]: Start isEmpty. Operand 3725 states and 11830 transitions. [2021-06-05 14:09:47,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:09:47,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:47,583 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:47,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36818 [2021-06-05 14:09:47,784 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:47,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:47,784 INFO L82 PathProgramCache]: Analyzing trace with hash 174035466, now seen corresponding path program 265 times [2021-06-05 14:09:47,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:47,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581539195] [2021-06-05 14:09:47,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:47,833 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:47,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:47,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581539195] [2021-06-05 14:09:47,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581539195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:47,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501909414] [2021-06-05 14:09:47,833 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 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 14:09:47,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:47,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:09:47,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:47,889 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:47,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501909414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:47,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:47,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:09:47,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609996756] [2021-06-05 14:09:47,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:09:47,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:47,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:09:47,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:09:47,890 INFO L87 Difference]: Start difference. First operand 3725 states and 11830 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:48,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:48,022 INFO L93 Difference]: Finished difference Result 4548 states and 13998 transitions. [2021-06-05 14:09:48,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:09:48,022 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:09:48,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:48,027 INFO L225 Difference]: With dead ends: 4548 [2021-06-05 14:09:48,027 INFO L226 Difference]: Without dead ends: 4548 [2021-06-05 14:09:48,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:09:48,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4548 states. [2021-06-05 14:09:48,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4548 to 3857. [2021-06-05 14:09:48,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3857 states, 3856 states have (on average 3.171421161825726) internal successors, (12229), 3856 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 14:09:48,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3857 states to 3857 states and 12229 transitions. [2021-06-05 14:09:48,076 INFO L78 Accepts]: Start accepts. Automaton has 3857 states and 12229 transitions. Word has length 20 [2021-06-05 14:09:48,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:48,076 INFO L482 AbstractCegarLoop]: Abstraction has 3857 states and 12229 transitions. [2021-06-05 14:09:48,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:48,076 INFO L276 IsEmpty]: Start isEmpty. Operand 3857 states and 12229 transitions. [2021-06-05 14:09:48,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:09:48,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:48,079 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:48,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36819,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:48,279 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:48,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:48,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1657170404, now seen corresponding path program 266 times [2021-06-05 14:09:48,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:48,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32421991] [2021-06-05 14:09:48,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:48,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:48,331 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:48,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:48,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32421991] [2021-06-05 14:09:48,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32421991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:48,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740406172] [2021-06-05 14:09:48,331 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 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 14:09:48,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:09:48,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:48,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:09:48,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:48,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740406172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:48,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:48,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:09:48,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823423904] [2021-06-05 14:09:48,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:09:48,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:48,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:09:48,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:09:48,409 INFO L87 Difference]: Start difference. First operand 3857 states and 12229 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:48,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:48,599 INFO L93 Difference]: Finished difference Result 5083 states and 15588 transitions. [2021-06-05 14:09:48,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:09:48,599 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:09:48,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:48,605 INFO L225 Difference]: With dead ends: 5083 [2021-06-05 14:09:48,605 INFO L226 Difference]: Without dead ends: 5083 [2021-06-05 14:09:48,605 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 145.4ms TimeCoverageRelationStatistics Valid=241, Invalid=461, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:09:48,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5083 states. [2021-06-05 14:09:48,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5083 to 3996. [2021-06-05 14:09:48,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3996 states, 3995 states have (on average 3.17171464330413) internal successors, (12671), 3995 states have internal predecessors, (12671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:48,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3996 states to 3996 states and 12671 transitions. [2021-06-05 14:09:48,661 INFO L78 Accepts]: Start accepts. Automaton has 3996 states and 12671 transitions. Word has length 20 [2021-06-05 14:09:48,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:48,661 INFO L482 AbstractCegarLoop]: Abstraction has 3996 states and 12671 transitions. [2021-06-05 14:09:48,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:48,661 INFO L276 IsEmpty]: Start isEmpty. Operand 3996 states and 12671 transitions. [2021-06-05 14:09:48,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:09:48,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:48,664 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:48,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36820 [2021-06-05 14:09:48,864 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:48,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:48,865 INFO L82 PathProgramCache]: Analyzing trace with hash -319341737, now seen corresponding path program 267 times [2021-06-05 14:09:48,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:48,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017323792] [2021-06-05 14:09:48,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:48,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:48,975 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:09:48,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:48,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017323792] [2021-06-05 14:09:48,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017323792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:48,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184727264] [2021-06-05 14:09:48,976 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 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 14:09:49,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:09:49,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:49,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:09:49,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:49,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:09:49,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:09:49,910 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 268 [2021-06-05 14:09:50,013 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 268 [2021-06-05 14:09:50,139 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 279 [2021-06-05 14:09:50,263 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 351 [2021-06-05 14:09:50,413 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 305 [2021-06-05 14:09:50,872 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 254 [2021-06-05 14:09:51,161 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 261 [2021-06-05 14:09:51,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:09:51,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:09:51,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:09:51,913 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:09:51,917 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:51,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184727264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:51,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:51,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 14:09:51,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940733569] [2021-06-05 14:09:51,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:09:51,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:51,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:09:51,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:09:51,918 INFO L87 Difference]: Start difference. First operand 3996 states and 12671 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:52,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:52,375 INFO L93 Difference]: Finished difference Result 4050 states and 12777 transitions. [2021-06-05 14:09:52,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:09:52,375 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:09:52,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:52,379 INFO L225 Difference]: With dead ends: 4050 [2021-06-05 14:09:52,379 INFO L226 Difference]: Without dead ends: 4040 [2021-06-05 14:09:52,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 336.7ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:09:52,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4040 states. [2021-06-05 14:09:52,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4040 to 3997. [2021-06-05 14:09:52,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3997 states, 3996 states have (on average 3.171921921921922) internal successors, (12675), 3996 states have internal predecessors, (12675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:52,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3997 states to 3997 states and 12675 transitions. [2021-06-05 14:09:52,423 INFO L78 Accepts]: Start accepts. Automaton has 3997 states and 12675 transitions. Word has length 20 [2021-06-05 14:09:52,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:52,423 INFO L482 AbstractCegarLoop]: Abstraction has 3997 states and 12675 transitions. [2021-06-05 14:09:52,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:52,423 INFO L276 IsEmpty]: Start isEmpty. Operand 3997 states and 12675 transitions. [2021-06-05 14:09:52,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:09:52,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:52,426 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:52,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36821 [2021-06-05 14:09:52,626 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:52,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:52,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1918399472, now seen corresponding path program 268 times [2021-06-05 14:09:52,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:52,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085041772] [2021-06-05 14:09:52,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:52,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:52,675 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:52,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:52,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085041772] [2021-06-05 14:09:52,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085041772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:52,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036881923] [2021-06-05 14:09:52,675 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 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 14:09:52,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:09:52,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:52,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:09:52,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:52,732 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:52,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036881923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:52,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:52,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:09:52,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157321397] [2021-06-05 14:09:52,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:09:52,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:52,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:09:52,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:09:52,732 INFO L87 Difference]: Start difference. First operand 3997 states and 12675 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:52,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:52,857 INFO L93 Difference]: Finished difference Result 4890 states and 15000 transitions. [2021-06-05 14:09:52,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:09:52,857 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:09:52,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:52,862 INFO L225 Difference]: With dead ends: 4890 [2021-06-05 14:09:52,862 INFO L226 Difference]: Without dead ends: 4890 [2021-06-05 14:09:52,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:09:52,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4890 states. [2021-06-05 14:09:52,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4890 to 2217. [2021-06-05 14:09:52,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2217 states, 2216 states have (on average 3.1164259927797833) internal successors, (6906), 2216 states have internal predecessors, (6906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:52,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 6906 transitions. [2021-06-05 14:09:52,894 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 6906 transitions. Word has length 20 [2021-06-05 14:09:52,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:52,894 INFO L482 AbstractCegarLoop]: Abstraction has 2217 states and 6906 transitions. [2021-06-05 14:09:52,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:52,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 6906 transitions. [2021-06-05 14:09:52,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:09:52,896 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:52,896 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:53,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37026,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:53,097 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:53,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:53,097 INFO L82 PathProgramCache]: Analyzing trace with hash -893432886, now seen corresponding path program 269 times [2021-06-05 14:09:53,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:53,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063196711] [2021-06-05 14:09:53,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:53,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:53,158 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:53,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:53,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063196711] [2021-06-05 14:09:53,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063196711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:53,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412438901] [2021-06-05 14:09:53,158 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 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 14:09:53,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:09:53,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:53,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:09:53,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:53,224 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:53,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412438901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:53,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:53,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:09:53,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511816821] [2021-06-05 14:09:53,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:09:53,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:53,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:09:53,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:09:53,225 INFO L87 Difference]: Start difference. First operand 2217 states and 6906 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:53,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:53,450 INFO L93 Difference]: Finished difference Result 3552 states and 10616 transitions. [2021-06-05 14:09:53,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:09:53,451 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:09:53,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:53,455 INFO L225 Difference]: With dead ends: 3552 [2021-06-05 14:09:53,455 INFO L226 Difference]: Without dead ends: 3552 [2021-06-05 14:09:53,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 165.8ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:09:53,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3552 states. [2021-06-05 14:09:53,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3552 to 2210. [2021-06-05 14:09:53,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2210 states, 2209 states have (on average 3.122227252150294) internal successors, (6897), 2209 states have internal predecessors, (6897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:53,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2210 states to 2210 states and 6897 transitions. [2021-06-05 14:09:53,493 INFO L78 Accepts]: Start accepts. Automaton has 2210 states and 6897 transitions. Word has length 20 [2021-06-05 14:09:53,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:53,493 INFO L482 AbstractCegarLoop]: Abstraction has 2210 states and 6897 transitions. [2021-06-05 14:09:53,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:53,493 INFO L276 IsEmpty]: Start isEmpty. Operand 2210 states and 6897 transitions. [2021-06-05 14:09:53,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:09:53,496 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:53,496 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:53,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37027 [2021-06-05 14:09:53,718 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:53,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:53,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1917147897, now seen corresponding path program 270 times [2021-06-05 14:09:53,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:53,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71170997] [2021-06-05 14:09:53,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:53,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:53,827 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:53,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:53,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71170997] [2021-06-05 14:09:53,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71170997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:53,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199113018] [2021-06-05 14:09:53,827 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 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 14:09:53,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:09:53,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:53,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:09:53,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:54,193 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:09:54,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:09:55,200 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 287 [2021-06-05 14:09:55,305 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 237 [2021-06-05 14:09:55,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:09:55,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:09:55,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:09:55,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:09:55,948 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:55,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199113018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:55,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:55,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:09:55,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605388466] [2021-06-05 14:09:55,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:09:55,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:55,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:09:55,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:09:55,949 INFO L87 Difference]: Start difference. First operand 2210 states and 6897 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 14:09:56,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:56,218 INFO L93 Difference]: Finished difference Result 2235 states and 6947 transitions. [2021-06-05 14:09:56,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:09:56,218 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 20 [2021-06-05 14:09:56,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:56,221 INFO L225 Difference]: With dead ends: 2235 [2021-06-05 14:09:56,221 INFO L226 Difference]: Without dead ends: 2230 [2021-06-05 14:09:56,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 344.1ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:09:56,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2021-06-05 14:09:56,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 2208. [2021-06-05 14:09:56,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2207 states have (on average 3.122791119166289) internal successors, (6892), 2207 states have internal predecessors, (6892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:56,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 6892 transitions. [2021-06-05 14:09:56,242 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 6892 transitions. Word has length 20 [2021-06-05 14:09:56,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:56,242 INFO L482 AbstractCegarLoop]: Abstraction has 2208 states and 6892 transitions. [2021-06-05 14:09:56,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 14:09:56,242 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 6892 transitions. [2021-06-05 14:09:56,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:09:56,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:56,244 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:56,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37028,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:56,445 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:56,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:56,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1281932618, now seen corresponding path program 271 times [2021-06-05 14:09:56,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:56,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906411771] [2021-06-05 14:09:56,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:56,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:56,495 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:56,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:56,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906411771] [2021-06-05 14:09:56,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906411771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:56,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680928168] [2021-06-05 14:09:56,495 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 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 14:09:56,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:56,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:09:56,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:56,557 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:56,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680928168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:56,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:56,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:09:56,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472032215] [2021-06-05 14:09:56,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:09:56,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:56,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:09:56,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:09:56,558 INFO L87 Difference]: Start difference. First operand 2208 states and 6892 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:56,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:56,672 INFO L93 Difference]: Finished difference Result 2603 states and 7643 transitions. [2021-06-05 14:09:56,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:09:56,673 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:09:56,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:56,675 INFO L225 Difference]: With dead ends: 2603 [2021-06-05 14:09:56,675 INFO L226 Difference]: Without dead ends: 2603 [2021-06-05 14:09:56,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:09:56,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2021-06-05 14:09:56,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 1561. [2021-06-05 14:09:56,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 3.0724358974358976) internal successors, (4793), 1560 states have internal predecessors, (4793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:56,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 4793 transitions. [2021-06-05 14:09:56,694 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 4793 transitions. Word has length 20 [2021-06-05 14:09:56,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:56,695 INFO L482 AbstractCegarLoop]: Abstraction has 1561 states and 4793 transitions. [2021-06-05 14:09:56,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:56,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 4793 transitions. [2021-06-05 14:09:56,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:09:56,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:56,696 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:56,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37319,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:56,897 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:56,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:56,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1529899740, now seen corresponding path program 272 times [2021-06-05 14:09:56,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:56,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309174484] [2021-06-05 14:09:56,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:56,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:56,964 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:56,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:56,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309174484] [2021-06-05 14:09:56,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309174484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:56,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207960949] [2021-06-05 14:09:56,964 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 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 14:09:56,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:09:56,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:56,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:09:56,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:57,037 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:57,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207960949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:57,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:57,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:09:57,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981751797] [2021-06-05 14:09:57,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:09:57,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:57,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:09:57,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:09:57,038 INFO L87 Difference]: Start difference. First operand 1561 states and 4793 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:57,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:57,235 INFO L93 Difference]: Finished difference Result 2319 states and 6788 transitions. [2021-06-05 14:09:57,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:09:57,236 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:09:57,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:57,238 INFO L225 Difference]: With dead ends: 2319 [2021-06-05 14:09:57,238 INFO L226 Difference]: Without dead ends: 2319 [2021-06-05 14:09:57,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 156.3ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:09:57,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2021-06-05 14:09:57,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 1568. [2021-06-05 14:09:57,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1568 states, 1567 states have (on average 3.0855137204850034) internal successors, (4835), 1567 states have internal predecessors, (4835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:57,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 4835 transitions. [2021-06-05 14:09:57,257 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 4835 transitions. Word has length 20 [2021-06-05 14:09:57,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:57,257 INFO L482 AbstractCegarLoop]: Abstraction has 1568 states and 4835 transitions. [2021-06-05 14:09:57,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:57,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 4835 transitions. [2021-06-05 14:09:57,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:09:57,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:57,258 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:57,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37320,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:57,460 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:57,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:57,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1497610378, now seen corresponding path program 273 times [2021-06-05 14:09:57,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:57,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339755228] [2021-06-05 14:09:57,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:57,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:57,517 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:57,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:57,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339755228] [2021-06-05 14:09:57,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339755228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:57,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057566246] [2021-06-05 14:09:57,518 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 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 14:09:57,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:09:57,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:57,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:09:57,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:57,597 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:57,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057566246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:57,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:57,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:09:57,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389844261] [2021-06-05 14:09:57,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:09:57,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:57,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:09:57,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:09:57,598 INFO L87 Difference]: Start difference. First operand 1568 states and 4835 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:57,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:57,851 INFO L93 Difference]: Finished difference Result 2424 states and 7063 transitions. [2021-06-05 14:09:57,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:09:57,851 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:09:57,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:57,853 INFO L225 Difference]: With dead ends: 2424 [2021-06-05 14:09:57,853 INFO L226 Difference]: Without dead ends: 2424 [2021-06-05 14:09:57,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 204.8ms TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:09:57,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2424 states. [2021-06-05 14:09:57,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2424 to 1795. [2021-06-05 14:09:57,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1794 states have (on average 3.092530657748049) internal successors, (5548), 1794 states have internal predecessors, (5548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:57,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 5548 transitions. [2021-06-05 14:09:57,894 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 5548 transitions. Word has length 20 [2021-06-05 14:09:57,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:57,894 INFO L482 AbstractCegarLoop]: Abstraction has 1795 states and 5548 transitions. [2021-06-05 14:09:57,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:57,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 5548 transitions. [2021-06-05 14:09:57,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:09:57,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:57,895 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:58,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37321,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:58,096 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:58,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:58,098 INFO L82 PathProgramCache]: Analyzing trace with hash -2078632399, now seen corresponding path program 274 times [2021-06-05 14:09:58,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:58,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461073222] [2021-06-05 14:09:58,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:58,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:58,190 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:58,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:58,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461073222] [2021-06-05 14:09:58,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461073222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:58,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525139412] [2021-06-05 14:09:58,191 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 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 14:09:58,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:09:58,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:58,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:09:58,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:58,568 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:09:58,568 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:09:58,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:09:59,035 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 225 [2021-06-05 14:09:59,669 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 266 [2021-06-05 14:09:59,794 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 303 [2021-06-05 14:10:00,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:10:00,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:10:00,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:10:00,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:10:00,608 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:00,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525139412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:00,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:00,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:10:00,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276683506] [2021-06-05 14:10:00,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:10:00,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:00,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:10:00,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:10:00,609 INFO L87 Difference]: Start difference. First operand 1795 states and 5548 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 14:10:01,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:01,099 INFO L93 Difference]: Finished difference Result 1927 states and 5783 transitions. [2021-06-05 14:10:01,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:10:01,100 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 20 [2021-06-05 14:10:01,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:01,102 INFO L225 Difference]: With dead ends: 1927 [2021-06-05 14:10:01,103 INFO L226 Difference]: Without dead ends: 1917 [2021-06-05 14:10:01,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 366.9ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:10:01,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2021-06-05 14:10:01,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1800. [2021-06-05 14:10:01,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1799 states have (on average 3.093941078376876) internal successors, (5566), 1799 states have internal predecessors, (5566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:01,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 5566 transitions. [2021-06-05 14:10:01,125 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 5566 transitions. Word has length 20 [2021-06-05 14:10:01,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:01,125 INFO L482 AbstractCegarLoop]: Abstraction has 1800 states and 5566 transitions. [2021-06-05 14:10:01,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 14:10:01,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 5566 transitions. [2021-06-05 14:10:01,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:10:01,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:01,127 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:01,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37322,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:01,345 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:01,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:01,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1005776894, now seen corresponding path program 275 times [2021-06-05 14:10:01,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:01,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616513826] [2021-06-05 14:10:01,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:01,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:01,406 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:01,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:01,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616513826] [2021-06-05 14:10:01,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616513826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:01,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852742950] [2021-06-05 14:10:01,406 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 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 14:10:01,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:10:01,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:01,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:10:01,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:01,472 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:01,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852742950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:01,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:01,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:10:01,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134734316] [2021-06-05 14:10:01,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:10:01,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:01,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:10:01,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:10:01,473 INFO L87 Difference]: Start difference. First operand 1800 states and 5566 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:01,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:01,820 INFO L93 Difference]: Finished difference Result 2241 states and 6581 transitions. [2021-06-05 14:10:01,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:10:01,821 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:10:01,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:01,824 INFO L225 Difference]: With dead ends: 2241 [2021-06-05 14:10:01,824 INFO L226 Difference]: Without dead ends: 2241 [2021-06-05 14:10:01,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 247.6ms TimeCoverageRelationStatistics Valid=223, Invalid=427, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:10:01,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2241 states. [2021-06-05 14:10:01,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2241 to 1485. [2021-06-05 14:10:01,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 3.0808625336927222) internal successors, (4572), 1484 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:01,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 4572 transitions. [2021-06-05 14:10:01,847 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 4572 transitions. Word has length 20 [2021-06-05 14:10:01,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:01,847 INFO L482 AbstractCegarLoop]: Abstraction has 1485 states and 4572 transitions. [2021-06-05 14:10:01,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:01,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 4572 transitions. [2021-06-05 14:10:01,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:10:01,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:01,848 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:02,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37547 [2021-06-05 14:10:02,072 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:02,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:02,072 INFO L82 PathProgramCache]: Analyzing trace with hash -261680284, now seen corresponding path program 276 times [2021-06-05 14:10:02,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:02,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177878482] [2021-06-05 14:10:02,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:02,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:02,137 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:02,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:02,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177878482] [2021-06-05 14:10:02,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177878482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:02,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620827038] [2021-06-05 14:10:02,137 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 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 14:10:02,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:10:02,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:02,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:10:02,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:02,222 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:02,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620827038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:02,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:02,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:10:02,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024096446] [2021-06-05 14:10:02,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:10:02,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:02,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:10:02,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:10:02,223 INFO L87 Difference]: Start difference. First operand 1485 states and 4572 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:02,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:02,532 INFO L93 Difference]: Finished difference Result 2226 states and 6445 transitions. [2021-06-05 14:10:02,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:10:02,532 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:10:02,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:02,537 INFO L225 Difference]: With dead ends: 2226 [2021-06-05 14:10:02,537 INFO L226 Difference]: Without dead ends: 2226 [2021-06-05 14:10:02,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 218.9ms TimeCoverageRelationStatistics Valid=334, Invalid=658, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:10:02,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-06-05 14:10:02,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1519. [2021-06-05 14:10:02,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 3.0843214756258233) internal successors, (4682), 1518 states have internal predecessors, (4682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:02,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 4682 transitions. [2021-06-05 14:10:02,559 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 4682 transitions. Word has length 20 [2021-06-05 14:10:02,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:02,559 INFO L482 AbstractCegarLoop]: Abstraction has 1519 states and 4682 transitions. [2021-06-05 14:10:02,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:02,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 4682 transitions. [2021-06-05 14:10:02,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:10:02,561 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:02,561 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:02,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37548 [2021-06-05 14:10:02,761 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:02,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:02,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1932074553, now seen corresponding path program 277 times [2021-06-05 14:10:02,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:02,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177879113] [2021-06-05 14:10:02,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:02,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:02,874 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:02,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:02,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177879113] [2021-06-05 14:10:02,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177879113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:02,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755171369] [2021-06-05 14:10:02,874 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 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 14:10:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:02,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:10:02,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:03,338 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:10:03,338 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:10:03,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:10:04,185 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 286 [2021-06-05 14:10:04,292 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 286 [2021-06-05 14:10:04,451 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 293 [2021-06-05 14:10:04,666 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 362 [2021-06-05 14:10:05,818 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 276 [2021-06-05 14:10:06,044 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 330 [2021-06-05 14:10:06,273 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 330 [2021-06-05 14:10:06,649 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 503 DAG size of output: 334 [2021-06-05 14:10:07,048 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 369 [2021-06-05 14:10:07,385 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 224 [2021-06-05 14:10:08,025 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 229 [2021-06-05 14:10:08,154 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 229 [2021-06-05 14:10:08,295 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 233 [2021-06-05 14:10:08,415 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 199 [2021-06-05 14:10:08,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:10:08,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:10:08,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:10:08,658 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:10:08,663 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:08,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755171369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:08,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:08,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:10:08,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654350077] [2021-06-05 14:10:08,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:10:08,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:08,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:10:08,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:10:08,664 INFO L87 Difference]: Start difference. First operand 1519 states and 4682 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 14:10:09,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:09,172 INFO L93 Difference]: Finished difference Result 1555 states and 4757 transitions. [2021-06-05 14:10:09,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:10:09,172 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 20 [2021-06-05 14:10:09,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:09,174 INFO L225 Difference]: With dead ends: 1555 [2021-06-05 14:10:09,174 INFO L226 Difference]: Without dead ends: 1550 [2021-06-05 14:10:09,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 369.3ms TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:10:09,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1550 states. [2021-06-05 14:10:09,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1550 to 1520. [2021-06-05 14:10:09,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1519 states have (on average 3.0849242922975644) internal successors, (4686), 1519 states have internal predecessors, (4686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:09,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 4686 transitions. [2021-06-05 14:10:09,190 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 4686 transitions. Word has length 20 [2021-06-05 14:10:09,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:09,190 INFO L482 AbstractCegarLoop]: Abstraction has 1520 states and 4686 transitions. [2021-06-05 14:10:09,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 14:10:09,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 4686 transitions. [2021-06-05 14:10:09,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:10:09,192 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:09,192 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:09,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37549 [2021-06-05 14:10:09,393 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:09,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:09,393 INFO L82 PathProgramCache]: Analyzing trace with hash -998610844, now seen corresponding path program 278 times [2021-06-05 14:10:09,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:09,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325201784] [2021-06-05 14:10:09,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:09,437 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:10:09,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:09,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325201784] [2021-06-05 14:10:09,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325201784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:09,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470058916] [2021-06-05 14:10:09,438 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 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 14:10:09,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:10:09,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:09,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:10:09,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:09,508 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:10:09,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470058916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:09,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:09,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:10:09,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504023678] [2021-06-05 14:10:09,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:10:09,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:09,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:10:09,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:10:09,509 INFO L87 Difference]: Start difference. First operand 1520 states and 4686 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:09,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:09,598 INFO L93 Difference]: Finished difference Result 1775 states and 5123 transitions. [2021-06-05 14:10:09,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:10:09,599 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:10:09,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:09,601 INFO L225 Difference]: With dead ends: 1775 [2021-06-05 14:10:09,601 INFO L226 Difference]: Without dead ends: 1775 [2021-06-05 14:10:09,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:10:09,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2021-06-05 14:10:09,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1531. [2021-06-05 14:10:09,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 3.08562091503268) internal successors, (4721), 1530 states have internal predecessors, (4721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:09,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 4721 transitions. [2021-06-05 14:10:09,625 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 4721 transitions. Word has length 20 [2021-06-05 14:10:09,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:09,625 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 4721 transitions. [2021-06-05 14:10:09,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:09,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 4721 transitions. [2021-06-05 14:10:09,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:10:09,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:09,627 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:09,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37970,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:09,827 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:09,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:09,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1235496650, now seen corresponding path program 279 times [2021-06-05 14:10:09,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:09,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328640420] [2021-06-05 14:10:09,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:09,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:09,882 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:09,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:09,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328640420] [2021-06-05 14:10:09,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328640420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:09,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999656863] [2021-06-05 14:10:09,883 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 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 14:10:09,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:10:09,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:09,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:10:09,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:09,954 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:09,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999656863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:09,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:09,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:10:09,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880607596] [2021-06-05 14:10:09,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:10:09,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:09,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:10:09,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:10:09,955 INFO L87 Difference]: Start difference. First operand 1531 states and 4721 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:10,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:10,062 INFO L93 Difference]: Finished difference Result 1802 states and 5179 transitions. [2021-06-05 14:10:10,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:10:10,062 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:10:10,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:10,064 INFO L225 Difference]: With dead ends: 1802 [2021-06-05 14:10:10,064 INFO L226 Difference]: Without dead ends: 1802 [2021-06-05 14:10:10,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:10:10,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2021-06-05 14:10:10,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1476. [2021-06-05 14:10:10,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1475 states have (on average 3.079322033898305) internal successors, (4542), 1475 states have internal predecessors, (4542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:10,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 4542 transitions. [2021-06-05 14:10:10,085 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 4542 transitions. Word has length 20 [2021-06-05 14:10:10,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:10,085 INFO L482 AbstractCegarLoop]: Abstraction has 1476 states and 4542 transitions. [2021-06-05 14:10:10,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:10,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 4542 transitions. [2021-06-05 14:10:10,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:10:10,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:10,087 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:10,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37971,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:10,287 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:10,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:10,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1773352228, now seen corresponding path program 280 times [2021-06-05 14:10:10,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:10,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737580527] [2021-06-05 14:10:10,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:10,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:10,358 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:10,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:10,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737580527] [2021-06-05 14:10:10,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737580527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:10,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845349736] [2021-06-05 14:10:10,359 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 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 14:10:10,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:10:10,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:10,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:10:10,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:10,442 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:10,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845349736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:10,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:10,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:10:10,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838333240] [2021-06-05 14:10:10,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:10:10,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:10,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:10:10,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:10:10,443 INFO L87 Difference]: Start difference. First operand 1476 states and 4542 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:10,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:10,558 INFO L93 Difference]: Finished difference Result 1732 states and 4957 transitions. [2021-06-05 14:10:10,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:10:10,558 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:10:10,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:10,560 INFO L225 Difference]: With dead ends: 1732 [2021-06-05 14:10:10,560 INFO L226 Difference]: Without dead ends: 1732 [2021-06-05 14:10:10,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 112.0ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:10:10,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2021-06-05 14:10:10,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1312. [2021-06-05 14:10:10,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1311 states have (on average 3.0671243325705566) internal successors, (4021), 1311 states have internal predecessors, (4021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:10,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 4021 transitions. [2021-06-05 14:10:10,579 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 4021 transitions. Word has length 20 [2021-06-05 14:10:10,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:10,579 INFO L482 AbstractCegarLoop]: Abstraction has 1312 states and 4021 transitions. [2021-06-05 14:10:10,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:10,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 4021 transitions. [2021-06-05 14:10:10,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:10:10,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:10,581 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:10,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37972,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:10,795 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:10,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:10,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1544826396, now seen corresponding path program 281 times [2021-06-05 14:10:10,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:10,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866683884] [2021-06-05 14:10:10,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:10,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:10,857 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:10,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:10,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866683884] [2021-06-05 14:10:10,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866683884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:10,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006810599] [2021-06-05 14:10:10,857 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 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 14:10:10,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:10:10,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:10,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:10:10,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:10,935 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:10,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006810599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:10,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:10,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:10:10,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824305748] [2021-06-05 14:10:10,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:10:10,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:10,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:10:10,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:10:10,936 INFO L87 Difference]: Start difference. First operand 1312 states and 4021 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:11,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:11,088 INFO L93 Difference]: Finished difference Result 1787 states and 5216 transitions. [2021-06-05 14:10:11,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:10:11,088 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:10:11,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:11,090 INFO L225 Difference]: With dead ends: 1787 [2021-06-05 14:10:11,090 INFO L226 Difference]: Without dead ends: 1787 [2021-06-05 14:10:11,091 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 135.0ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:10:11,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2021-06-05 14:10:11,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 1538. [2021-06-05 14:10:11,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 3.0709173715029277) internal successors, (4720), 1537 states have internal predecessors, (4720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:11,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 4720 transitions. [2021-06-05 14:10:11,112 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 4720 transitions. Word has length 20 [2021-06-05 14:10:11,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:11,112 INFO L482 AbstractCegarLoop]: Abstraction has 1538 states and 4720 transitions. [2021-06-05 14:10:11,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:11,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 4720 transitions. [2021-06-05 14:10:11,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:10:11,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:11,114 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:11,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37973 [2021-06-05 14:10:11,337 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:11,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:11,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1482683722, now seen corresponding path program 282 times [2021-06-05 14:10:11,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:11,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533501643] [2021-06-05 14:10:11,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:11,401 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:11,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:11,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533501643] [2021-06-05 14:10:11,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533501643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:11,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437123386] [2021-06-05 14:10:11,402 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 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 14:10:11,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:10:11,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:11,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:10:11,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:11,617 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:11,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437123386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:11,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:11,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:10:11,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564150052] [2021-06-05 14:10:11,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:10:11,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:11,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:10:11,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:10:11,618 INFO L87 Difference]: Start difference. First operand 1538 states and 4720 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:11,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:11,836 INFO L93 Difference]: Finished difference Result 1812 states and 5269 transitions. [2021-06-05 14:10:11,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:10:11,836 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:10:11,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:11,838 INFO L225 Difference]: With dead ends: 1812 [2021-06-05 14:10:11,838 INFO L226 Difference]: Without dead ends: 1812 [2021-06-05 14:10:11,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 188.2ms TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:10:11,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2021-06-05 14:10:11,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1587. [2021-06-05 14:10:11,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 3.0687263556116013) internal successors, (4867), 1586 states have internal predecessors, (4867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:11,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 4867 transitions. [2021-06-05 14:10:11,861 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 4867 transitions. Word has length 20 [2021-06-05 14:10:11,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:11,861 INFO L482 AbstractCegarLoop]: Abstraction has 1587 states and 4867 transitions. [2021-06-05 14:10:11,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:11,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 4867 transitions. [2021-06-05 14:10:11,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:10:11,863 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:11,863 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:12,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37974 [2021-06-05 14:10:12,077 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:12,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:12,078 INFO L82 PathProgramCache]: Analyzing trace with hash 846216868, now seen corresponding path program 283 times [2021-06-05 14:10:12,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:12,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596473152] [2021-06-05 14:10:12,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:12,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:12,153 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:12,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:12,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596473152] [2021-06-05 14:10:12,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596473152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:12,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421451178] [2021-06-05 14:10:12,154 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 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 14:10:12,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:12,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:10:12,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:12,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421451178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:12,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:12,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:10:12,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834049884] [2021-06-05 14:10:12,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:10:12,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:12,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:10:12,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:10:12,233 INFO L87 Difference]: Start difference. First operand 1587 states and 4867 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:12,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:12,511 INFO L93 Difference]: Finished difference Result 1938 states and 5602 transitions. [2021-06-05 14:10:12,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:10:12,511 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:10:12,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:12,514 INFO L225 Difference]: With dead ends: 1938 [2021-06-05 14:10:12,514 INFO L226 Difference]: Without dead ends: 1938 [2021-06-05 14:10:12,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 241.4ms TimeCoverageRelationStatistics Valid=353, Invalid=703, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:10:12,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1938 states. [2021-06-05 14:10:12,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1938 to 1604. [2021-06-05 14:10:12,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1603 states have (on average 3.0679975046787273) internal successors, (4918), 1603 states have internal predecessors, (4918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:12,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 4918 transitions. [2021-06-05 14:10:12,537 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 4918 transitions. Word has length 20 [2021-06-05 14:10:12,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:12,537 INFO L482 AbstractCegarLoop]: Abstraction has 1604 states and 4918 transitions. [2021-06-05 14:10:12,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:12,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 4918 transitions. [2021-06-05 14:10:12,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:10:12,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:12,539 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:12,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37975 [2021-06-05 14:10:12,740 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:12,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:12,740 INFO L82 PathProgramCache]: Analyzing trace with hash -782068073, now seen corresponding path program 284 times [2021-06-05 14:10:12,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:12,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145715625] [2021-06-05 14:10:12,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:12,868 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:12,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:12,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145715625] [2021-06-05 14:10:12,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145715625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:12,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285735928] [2021-06-05 14:10:12,868 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 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 14:10:12,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:10:12,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:12,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:10:12,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:13,319 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:10:13,319 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:10:13,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:10:14,120 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 303 [2021-06-05 14:10:14,305 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 325 [2021-06-05 14:10:14,489 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 325 [2021-06-05 14:10:14,715 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 336 [2021-06-05 14:10:14,910 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 288 [2021-06-05 14:10:15,130 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 327 [2021-06-05 14:10:15,322 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 297 [2021-06-05 14:10:16,021 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 270 [2021-06-05 14:10:16,168 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 270 [2021-06-05 14:10:16,333 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 240 [2021-06-05 14:10:16,439 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 232 [2021-06-05 14:10:17,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:10:17,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:10:17,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:10:17,338 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:10:17,342 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:17,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285735928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:17,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:17,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:10:17,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888622279] [2021-06-05 14:10:17,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:10:17,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:17,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:10:17,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:10:17,343 INFO L87 Difference]: Start difference. First operand 1604 states and 4918 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 14:10:18,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:18,023 INFO L93 Difference]: Finished difference Result 1808 states and 5373 transitions. [2021-06-05 14:10:18,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:10:18,024 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 20 [2021-06-05 14:10:18,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:18,027 INFO L225 Difference]: With dead ends: 1808 [2021-06-05 14:10:18,027 INFO L226 Difference]: Without dead ends: 1798 [2021-06-05 14:10:18,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 438.3ms TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:10:18,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2021-06-05 14:10:18,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1653. [2021-06-05 14:10:18,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 3.087772397094431) internal successors, (5101), 1652 states have internal predecessors, (5101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:18,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 5101 transitions. [2021-06-05 14:10:18,051 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 5101 transitions. Word has length 20 [2021-06-05 14:10:18,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:18,051 INFO L482 AbstractCegarLoop]: Abstraction has 1653 states and 5101 transitions. [2021-06-05 14:10:18,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 14:10:18,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 5101 transitions. [2021-06-05 14:10:18,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:10:18,053 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:18,053 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:18,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37976 [2021-06-05 14:10:18,277 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:18,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:18,277 INFO L82 PathProgramCache]: Analyzing trace with hash -395866959, now seen corresponding path program 285 times [2021-06-05 14:10:18,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:18,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244894149] [2021-06-05 14:10:18,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:18,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:18,403 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:18,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:18,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244894149] [2021-06-05 14:10:18,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244894149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:18,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999643330] [2021-06-05 14:10:18,404 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 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 14:10:18,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:10:18,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:18,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:10:18,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:18,880 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:10:18,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:10:18,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:10:20,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:10:20,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:10:20,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:10:20,169 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:10:20,175 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:20,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999643330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:20,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:20,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 14:10:20,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012231483] [2021-06-05 14:10:20,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 14:10:20,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:20,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 14:10:20,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:10:20,176 INFO L87 Difference]: Start difference. First operand 1653 states and 5101 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:20,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:20,838 INFO L93 Difference]: Finished difference Result 1770 states and 5320 transitions. [2021-06-05 14:10:20,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:10:20,839 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:10:20,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:20,841 INFO L225 Difference]: With dead ends: 1770 [2021-06-05 14:10:20,841 INFO L226 Difference]: Without dead ends: 1765 [2021-06-05 14:10:20,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 494.8ms TimeCoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:10:20,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2021-06-05 14:10:20,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1653. [2021-06-05 14:10:20,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 3.087772397094431) internal successors, (5101), 1652 states have internal predecessors, (5101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:20,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 5101 transitions. [2021-06-05 14:10:20,864 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 5101 transitions. Word has length 20 [2021-06-05 14:10:20,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:20,864 INFO L482 AbstractCegarLoop]: Abstraction has 1653 states and 5101 transitions. [2021-06-05 14:10:20,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:20,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 5101 transitions. [2021-06-05 14:10:20,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:10:20,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:20,866 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:21,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38314 [2021-06-05 14:10:21,089 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:21,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:21,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1057130742, now seen corresponding path program 286 times [2021-06-05 14:10:21,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:21,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034940188] [2021-06-05 14:10:21,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:21,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:21,154 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:21,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:21,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034940188] [2021-06-05 14:10:21,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034940188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:21,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798021088] [2021-06-05 14:10:21,155 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 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 14:10:21,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:10:21,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:21,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:10:21,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:21,228 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:21,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798021088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:21,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:21,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:10:21,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189032599] [2021-06-05 14:10:21,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:10:21,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:21,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:10:21,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:10:21,229 INFO L87 Difference]: Start difference. First operand 1653 states and 5101 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:21,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:21,326 INFO L93 Difference]: Finished difference Result 1988 states and 5715 transitions. [2021-06-05 14:10:21,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:10:21,327 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:10:21,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:21,329 INFO L225 Difference]: With dead ends: 1988 [2021-06-05 14:10:21,329 INFO L226 Difference]: Without dead ends: 1988 [2021-06-05 14:10:21,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 72.9ms TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:10:21,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2021-06-05 14:10:21,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1661. [2021-06-05 14:10:21,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1660 states have (on average 3.0897590361445784) internal successors, (5129), 1660 states have internal predecessors, (5129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:21,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 5129 transitions. [2021-06-05 14:10:21,354 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 5129 transitions. Word has length 20 [2021-06-05 14:10:21,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:21,354 INFO L482 AbstractCegarLoop]: Abstraction has 1661 states and 5129 transitions. [2021-06-05 14:10:21,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:21,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 5129 transitions. [2021-06-05 14:10:21,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:10:21,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:21,356 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:21,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38486,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:21,579 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:21,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:21,579 INFO L82 PathProgramCache]: Analyzing trace with hash 757652935, now seen corresponding path program 287 times [2021-06-05 14:10:21,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:21,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948120359] [2021-06-05 14:10:21,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:21,720 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:21,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:21,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948120359] [2021-06-05 14:10:21,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948120359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:21,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795739867] [2021-06-05 14:10:21,720 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 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 14:10:21,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:10:21,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:21,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:10:21,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:22,155 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:10:22,156 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:10:22,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:10:22,852 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 228 [2021-06-05 14:10:22,955 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 228 [2021-06-05 14:10:23,094 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 239 [2021-06-05 14:10:23,373 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 259 [2021-06-05 14:10:23,922 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 255 [2021-06-05 14:10:24,114 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 214 [2021-06-05 14:10:24,493 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 233 [2021-06-05 14:10:24,708 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 336 [2021-06-05 14:10:25,077 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 375 [2021-06-05 14:10:25,447 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 375 [2021-06-05 14:10:25,886 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 521 DAG size of output: 380 [2021-06-05 14:10:26,295 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 478 [2021-06-05 14:10:26,546 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 322 [2021-06-05 14:10:27,011 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 210 [2021-06-05 14:10:27,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:10:27,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:10:27,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:10:27,336 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:10:27,341 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:27,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795739867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:27,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:27,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:10:27,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724970927] [2021-06-05 14:10:27,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:10:27,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:27,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:10:27,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:10:27,342 INFO L87 Difference]: Start difference. First operand 1661 states and 5129 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:27,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:27,880 INFO L93 Difference]: Finished difference Result 1764 states and 5293 transitions. [2021-06-05 14:10:27,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:10:27,880 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:10:27,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:27,882 INFO L225 Difference]: With dead ends: 1764 [2021-06-05 14:10:27,882 INFO L226 Difference]: Without dead ends: 1737 [2021-06-05 14:10:27,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 436.7ms TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:10:27,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2021-06-05 14:10:27,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1661. [2021-06-05 14:10:27,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1660 states have (on average 3.075903614457831) internal successors, (5106), 1660 states have internal predecessors, (5106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:27,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 5106 transitions. [2021-06-05 14:10:27,902 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 5106 transitions. Word has length 20 [2021-06-05 14:10:27,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:27,902 INFO L482 AbstractCegarLoop]: Abstraction has 1661 states and 5106 transitions. [2021-06-05 14:10:27,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:27,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 5106 transitions. [2021-06-05 14:10:27,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:10:27,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:27,904 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:28,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38487,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:28,104 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:28,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:28,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1034884042, now seen corresponding path program 288 times [2021-06-05 14:10:28,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:28,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968464345] [2021-06-05 14:10:28,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:28,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:28,179 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:28,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:28,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968464345] [2021-06-05 14:10:28,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968464345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:28,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646626004] [2021-06-05 14:10:28,180 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 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 14:10:28,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:10:28,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:28,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:10:28,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:28,262 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:28,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646626004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:28,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:28,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:10:28,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209273883] [2021-06-05 14:10:28,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:10:28,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:28,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:10:28,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:10:28,264 INFO L87 Difference]: Start difference. First operand 1661 states and 5106 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:28,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:28,529 INFO L93 Difference]: Finished difference Result 2203 states and 6445 transitions. [2021-06-05 14:10:28,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:10:28,530 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:10:28,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:28,532 INFO L225 Difference]: With dead ends: 2203 [2021-06-05 14:10:28,532 INFO L226 Difference]: Without dead ends: 2203 [2021-06-05 14:10:28,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 216.0ms TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:10:28,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2203 states. [2021-06-05 14:10:28,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2203 to 1708. [2021-06-05 14:10:28,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 3.074985354422964) internal successors, (5249), 1707 states have internal predecessors, (5249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:28,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 5249 transitions. [2021-06-05 14:10:28,585 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 5249 transitions. Word has length 20 [2021-06-05 14:10:28,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:28,585 INFO L482 AbstractCegarLoop]: Abstraction has 1708 states and 5249 transitions. [2021-06-05 14:10:28,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:28,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 5249 transitions. [2021-06-05 14:10:28,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:10:28,587 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:28,587 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:28,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38706 [2021-06-05 14:10:28,801 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:28,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:28,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1515719248, now seen corresponding path program 289 times [2021-06-05 14:10:28,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:28,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159098411] [2021-06-05 14:10:28,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:28,866 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:28,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:28,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159098411] [2021-06-05 14:10:28,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159098411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:28,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475675123] [2021-06-05 14:10:28,866 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 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 14:10:28,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:28,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:10:28,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:28,942 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:28,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475675123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:28,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:28,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:10:28,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010247260] [2021-06-05 14:10:28,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:10:28,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:28,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:10:28,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:10:28,943 INFO L87 Difference]: Start difference. First operand 1708 states and 5249 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:29,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:29,166 INFO L93 Difference]: Finished difference Result 1957 states and 5754 transitions. [2021-06-05 14:10:29,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:10:29,166 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:10:29,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:29,168 INFO L225 Difference]: With dead ends: 1957 [2021-06-05 14:10:29,168 INFO L226 Difference]: Without dead ends: 1957 [2021-06-05 14:10:29,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 183.1ms TimeCoverageRelationStatistics Valid=255, Invalid=501, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:10:29,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2021-06-05 14:10:29,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1714. [2021-06-05 14:10:29,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1713 states have (on average 3.0758902510215997) internal successors, (5269), 1713 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:29,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 5269 transitions. [2021-06-05 14:10:29,192 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 5269 transitions. Word has length 20 [2021-06-05 14:10:29,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:29,192 INFO L482 AbstractCegarLoop]: Abstraction has 1714 states and 5269 transitions. [2021-06-05 14:10:29,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:29,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 5269 transitions. [2021-06-05 14:10:29,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:10:29,194 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:29,194 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:29,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38707,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:29,407 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:29,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:29,407 INFO L82 PathProgramCache]: Analyzing trace with hash 2142781194, now seen corresponding path program 290 times [2021-06-05 14:10:29,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:29,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835784539] [2021-06-05 14:10:29,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:29,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:29,478 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:29,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:29,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835784539] [2021-06-05 14:10:29,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835784539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:29,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899940196] [2021-06-05 14:10:29,479 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 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 14:10:29,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:10:29,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:29,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:10:29,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:29,555 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:29,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899940196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:29,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:29,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:10:29,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192880439] [2021-06-05 14:10:29,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:10:29,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:29,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:10:29,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:10:29,556 INFO L87 Difference]: Start difference. First operand 1714 states and 5269 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:29,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:29,793 INFO L93 Difference]: Finished difference Result 2009 states and 5887 transitions. [2021-06-05 14:10:29,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:10:29,794 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:10:29,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:29,796 INFO L225 Difference]: With dead ends: 2009 [2021-06-05 14:10:29,796 INFO L226 Difference]: Without dead ends: 2009 [2021-06-05 14:10:29,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 209.4ms TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:10:29,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2009 states. [2021-06-05 14:10:29,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2009 to 1728. [2021-06-05 14:10:29,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1727 states have (on average 3.0752750434279097) internal successors, (5311), 1727 states have internal predecessors, (5311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:29,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 5311 transitions. [2021-06-05 14:10:29,814 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 5311 transitions. Word has length 20 [2021-06-05 14:10:29,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:29,814 INFO L482 AbstractCegarLoop]: Abstraction has 1728 states and 5311 transitions. [2021-06-05 14:10:29,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:29,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 5311 transitions. [2021-06-05 14:10:29,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:10:29,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:29,816 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:30,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38708,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:30,017 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:30,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:30,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1900166407, now seen corresponding path program 291 times [2021-06-05 14:10:30,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:30,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369283699] [2021-06-05 14:10:30,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:30,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:30,136 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:30,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:30,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369283699] [2021-06-05 14:10:30,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369283699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:30,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814130050] [2021-06-05 14:10:30,137 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 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 14:10:30,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:10:30,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:30,175 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 14:10:30,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:30,595 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:10:30,595 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:10:30,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:10:31,953 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 257 [2021-06-05 14:10:33,516 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 515 DAG size of output: 338 [2021-06-05 14:10:33,820 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 779 DAG size of output: 474 [2021-06-05 14:10:34,252 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 831 DAG size of output: 524 [2021-06-05 14:10:34,755 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 887 DAG size of output: 575 [2021-06-05 14:10:35,300 WARN L205 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 887 DAG size of output: 575 [2021-06-05 14:10:35,930 WARN L205 SmtUtils]: Spent 627.00 ms on a formula simplification. DAG size of input: 892 DAG size of output: 580 [2021-06-05 14:10:36,847 WARN L205 SmtUtils]: Spent 908.00 ms on a formula simplification. DAG size of input: 582 DAG size of output: 697 [2021-06-05 14:10:37,278 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 342 [2021-06-05 14:10:38,239 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 493 [2021-06-05 14:10:38,490 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 440 [2021-06-05 14:10:38,759 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 314 [2021-06-05 14:10:39,087 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 441 DAG size of output: 363 [2021-06-05 14:10:39,452 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 574 DAG size of output: 431 [2021-06-05 14:10:39,668 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 595 DAG size of output: 443 [2021-06-05 14:10:39,983 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 673 DAG size of output: 498 [2021-06-05 14:10:40,346 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 990 DAG size of output: 492 [2021-06-05 14:10:40,663 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 990 DAG size of output: 492 [2021-06-05 14:10:41,046 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 993 DAG size of output: 496 [2021-06-05 14:10:41,255 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 340 [2021-06-05 14:10:41,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:10:41,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:10:41,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:10:41,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:10:41,953 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:41,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814130050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:41,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:41,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:10:41,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144649154] [2021-06-05 14:10:41,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:10:41,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:41,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:10:41,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:10:41,953 INFO L87 Difference]: Start difference. First operand 1728 states and 5311 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 14:10:42,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:42,326 INFO L93 Difference]: Finished difference Result 1933 states and 5906 transitions. [2021-06-05 14:10:42,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:10:42,326 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 20 [2021-06-05 14:10:42,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:42,328 INFO L225 Difference]: With dead ends: 1933 [2021-06-05 14:10:42,328 INFO L226 Difference]: Without dead ends: 1928 [2021-06-05 14:10:42,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 368.5ms TimeCoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:10:42,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-06-05 14:10:42,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1883. [2021-06-05 14:10:42,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1883 states, 1882 states have (on average 3.081296493092455) internal successors, (5799), 1882 states have internal predecessors, (5799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:42,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1883 states to 1883 states and 5799 transitions. [2021-06-05 14:10:42,347 INFO L78 Accepts]: Start accepts. Automaton has 1883 states and 5799 transitions. Word has length 20 [2021-06-05 14:10:42,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:42,347 INFO L482 AbstractCegarLoop]: Abstraction has 1883 states and 5799 transitions. [2021-06-05 14:10:42,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 23 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 14:10:42,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1883 states and 5799 transitions. [2021-06-05 14:10:42,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:10:42,348 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:42,349 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:42,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38709 [2021-06-05 14:10:42,549 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:42,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:42,550 INFO L82 PathProgramCache]: Analyzing trace with hash -800073397, now seen corresponding path program 292 times [2021-06-05 14:10:42,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:42,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370414555] [2021-06-05 14:10:42,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:42,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:42,765 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:42,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:42,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370414555] [2021-06-05 14:10:42,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370414555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:42,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417343344] [2021-06-05 14:10:42,765 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 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 14:10:42,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:10:42,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:42,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 14:10:42,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:43,172 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 14:10:43,173 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:10:43,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 14:10:44,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:10:44,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:10:44,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:10:44,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 14:10:44,116 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:44,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417343344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:44,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:44,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 14:10:44,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98952828] [2021-06-05 14:10:44,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 14:10:44,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:44,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 14:10:44,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:10:44,117 INFO L87 Difference]: Start difference. First operand 1883 states and 5799 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:44,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:44,815 INFO L93 Difference]: Finished difference Result 1955 states and 5932 transitions. [2021-06-05 14:10:44,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:10:44,815 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:10:44,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:44,818 INFO L225 Difference]: With dead ends: 1955 [2021-06-05 14:10:44,818 INFO L226 Difference]: Without dead ends: 1950 [2021-06-05 14:10:44,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 489.6ms TimeCoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:10:44,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2021-06-05 14:10:44,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1883. [2021-06-05 14:10:44,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1883 states, 1882 states have (on average 3.081296493092455) internal successors, (5799), 1882 states have internal predecessors, (5799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:44,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1883 states to 1883 states and 5799 transitions. [2021-06-05 14:10:44,837 INFO L78 Accepts]: Start accepts. Automaton has 1883 states and 5799 transitions. Word has length 20 [2021-06-05 14:10:44,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:44,837 INFO L482 AbstractCegarLoop]: Abstraction has 1883 states and 5799 transitions. [2021-06-05 14:10:44,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:44,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1883 states and 5799 transitions. [2021-06-05 14:10:44,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:10:44,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:44,838 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:45,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39426,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:45,039 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:45,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:45,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1461337180, now seen corresponding path program 293 times [2021-06-05 14:10:45,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:45,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988663713] [2021-06-05 14:10:45,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:45,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:45,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:45,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988663713] [2021-06-05 14:10:45,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988663713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:45,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219143432] [2021-06-05 14:10:45,090 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 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 14:10:45,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:10:45,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:45,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:10:45,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:45,158 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:45,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219143432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:45,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:45,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:10:45,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448805397] [2021-06-05 14:10:45,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:10:45,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:45,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:10:45,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:10:45,159 INFO L87 Difference]: Start difference. First operand 1883 states and 5799 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:45,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:45,260 INFO L93 Difference]: Finished difference Result 2214 states and 6381 transitions. [2021-06-05 14:10:45,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:10:45,260 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:10:45,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:45,263 INFO L225 Difference]: With dead ends: 2214 [2021-06-05 14:10:45,263 INFO L226 Difference]: Without dead ends: 2214 [2021-06-05 14:10:45,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 76.3ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:10:45,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-06-05 14:10:45,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 1898. [2021-06-05 14:10:45,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1898 states, 1897 states have (on average 3.084343700579863) internal successors, (5851), 1897 states have internal predecessors, (5851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:45,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1898 states to 1898 states and 5851 transitions. [2021-06-05 14:10:45,287 INFO L78 Accepts]: Start accepts. Automaton has 1898 states and 5851 transitions. Word has length 20 [2021-06-05 14:10:45,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:45,287 INFO L482 AbstractCegarLoop]: Abstraction has 1898 states and 5851 transitions. [2021-06-05 14:10:45,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:45,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1898 states and 5851 transitions. [2021-06-05 14:10:45,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:10:45,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:45,290 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:45,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39600,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:45,511 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:45,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:45,512 INFO L82 PathProgramCache]: Analyzing trace with hash 772770314, now seen corresponding path program 294 times [2021-06-05 14:10:45,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:45,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586303289] [2021-06-05 14:10:45,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:45,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:45,559 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:45,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:45,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586303289] [2021-06-05 14:10:45,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586303289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:45,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646480899] [2021-06-05 14:10:45,559 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 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 14:10:45,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:10:45,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:45,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:10:45,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:45,619 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:10:45,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646480899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:45,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:45,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:10:45,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677822117] [2021-06-05 14:10:45,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:10:45,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:45,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:10:45,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:10:45,620 INFO L87 Difference]: Start difference. First operand 1898 states and 5851 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:45,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:45,736 INFO L93 Difference]: Finished difference Result 2225 states and 6496 transitions. [2021-06-05 14:10:45,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:10:45,736 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:10:45,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:45,738 INFO L225 Difference]: With dead ends: 2225 [2021-06-05 14:10:45,738 INFO L226 Difference]: Without dead ends: 2225 [2021-06-05 14:10:45,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 90.5ms TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:10:45,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-06-05 14:10:45,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 1963. [2021-06-05 14:10:45,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 3.0866462793068297) internal successors, (6056), 1962 states have internal predecessors, (6056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:45,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 6056 transitions. [2021-06-05 14:10:45,758 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 6056 transitions. Word has length 20 [2021-06-05 14:10:45,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:45,758 INFO L482 AbstractCegarLoop]: Abstraction has 1963 states and 6056 transitions. [2021-06-05 14:10:45,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:45,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 6056 transitions. [2021-06-05 14:10:45,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:10:45,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:45,760 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:45,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39601 [2021-06-05 14:10:45,970 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:45,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:45,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1310625892, now seen corresponding path program 295 times [2021-06-05 14:10:45,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:45,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824718923] [2021-06-05 14:10:45,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:45,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:46,023 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:46,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:46,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824718923] [2021-06-05 14:10:46,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824718923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:46,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721511964] [2021-06-05 14:10:46,023 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 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 14:10:46,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:46,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:10:46,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:46,089 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:46,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721511964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:46,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:46,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:10:46,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390925810] [2021-06-05 14:10:46,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:10:46,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:46,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:10:46,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:10:46,090 INFO L87 Difference]: Start difference. First operand 1963 states and 6056 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:46,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:46,226 INFO L93 Difference]: Finished difference Result 2251 states and 6550 transitions. [2021-06-05 14:10:46,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:10:46,226 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:10:46,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:46,229 INFO L225 Difference]: With dead ends: 2251 [2021-06-05 14:10:46,229 INFO L226 Difference]: Without dead ends: 2251 [2021-06-05 14:10:46,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:10:46,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2021-06-05 14:10:46,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 1967. [2021-06-05 14:10:46,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1966 states have (on average 3.084944048830112) internal successors, (6065), 1966 states have internal predecessors, (6065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:46,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 6065 transitions. [2021-06-05 14:10:46,249 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 6065 transitions. Word has length 20 [2021-06-05 14:10:46,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:46,249 INFO L482 AbstractCegarLoop]: Abstraction has 1967 states and 6065 transitions. [2021-06-05 14:10:46,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:46,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 6065 transitions. [2021-06-05 14:10:46,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:10:46,251 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:46,251 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:46,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39602 [2021-06-05 14:10:46,451 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:46,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:46,452 INFO L82 PathProgramCache]: Analyzing trace with hash -2007552732, now seen corresponding path program 296 times [2021-06-05 14:10:46,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:46,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508312104] [2021-06-05 14:10:46,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:46,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:46,507 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:10:46,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:46,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508312104] [2021-06-05 14:10:46,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508312104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:46,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601013524] [2021-06-05 14:10:46,508 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 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 14:10:46,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:10:46,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:46,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:10:46,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:46,581 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:10:46,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601013524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:46,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:46,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:10:46,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023789311] [2021-06-05 14:10:46,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:10:46,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:46,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:10:46,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:10:46,582 INFO L87 Difference]: Start difference. First operand 1967 states and 6065 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:46,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:46,675 INFO L93 Difference]: Finished difference Result 2072 states and 6290 transitions. [2021-06-05 14:10:46,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:10:46,676 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:10:46,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:46,678 INFO L225 Difference]: With dead ends: 2072 [2021-06-05 14:10:46,678 INFO L226 Difference]: Without dead ends: 2072 [2021-06-05 14:10:46,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:10:46,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-06-05 14:10:46,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 2004. [2021-06-05 14:10:46,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2004 states, 2003 states have (on average 3.0833749375936095) internal successors, (6176), 2003 states have internal predecessors, (6176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:46,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 6176 transitions. [2021-06-05 14:10:46,704 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 6176 transitions. Word has length 20 [2021-06-05 14:10:46,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:46,704 INFO L482 AbstractCegarLoop]: Abstraction has 2004 states and 6176 transitions. [2021-06-05 14:10:46,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:46,704 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 6176 transitions. [2021-06-05 14:10:46,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:10:46,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:46,706 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:46,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39603 [2021-06-05 14:10:46,907 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:46,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:46,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1019957386, now seen corresponding path program 297 times [2021-06-05 14:10:46,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:46,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342552726] [2021-06-05 14:10:46,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:46,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:46,975 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:46,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:46,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342552726] [2021-06-05 14:10:46,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342552726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:46,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999644350] [2021-06-05 14:10:46,976 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 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 14:10:47,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:10:47,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:47,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:10:47,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:47,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999644350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:47,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:47,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:10:47,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348505040] [2021-06-05 14:10:47,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:10:47,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:47,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:10:47,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:10:47,053 INFO L87 Difference]: Start difference. First operand 2004 states and 6176 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:47,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:47,194 INFO L93 Difference]: Finished difference Result 2124 states and 6392 transitions. [2021-06-05 14:10:47,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:10:47,194 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:10:47,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:47,196 INFO L225 Difference]: With dead ends: 2124 [2021-06-05 14:10:47,196 INFO L226 Difference]: Without dead ends: 2124 [2021-06-05 14:10:47,196 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 135.3ms TimeCoverageRelationStatistics Valid=181, Invalid=371, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:10:47,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2021-06-05 14:10:47,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 2003. [2021-06-05 14:10:47,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2003 states, 2002 states have (on average 3.083416583416583) internal successors, (6173), 2002 states have internal predecessors, (6173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:47,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 6173 transitions. [2021-06-05 14:10:47,216 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 6173 transitions. Word has length 20 [2021-06-05 14:10:47,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:47,216 INFO L482 AbstractCegarLoop]: Abstraction has 2003 states and 6173 transitions. [2021-06-05 14:10:47,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:47,216 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 6173 transitions. [2021-06-05 14:10:47,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:10:47,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:47,218 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:47,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39604 [2021-06-05 14:10:47,418 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:47,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:47,419 INFO L82 PathProgramCache]: Analyzing trace with hash 383490532, now seen corresponding path program 298 times [2021-06-05 14:10:47,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:47,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375587148] [2021-06-05 14:10:47,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:47,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:47,478 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:47,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:47,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375587148] [2021-06-05 14:10:47,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375587148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:47,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543121067] [2021-06-05 14:10:47,478 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 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 14:10:47,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:10:47,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:47,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:10:47,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:47,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543121067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:47,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:47,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:10:47,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053140021] [2021-06-05 14:10:47,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:10:47,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:47,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:10:47,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:10:47,542 INFO L87 Difference]: Start difference. First operand 2003 states and 6173 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:47,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:47,729 INFO L93 Difference]: Finished difference Result 2203 states and 6584 transitions. [2021-06-05 14:10:47,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:10:47,729 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:10:47,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:47,731 INFO L225 Difference]: With dead ends: 2203 [2021-06-05 14:10:47,731 INFO L226 Difference]: Without dead ends: 2203 [2021-06-05 14:10:47,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 160.5ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:10:47,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2203 states. [2021-06-05 14:10:47,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2203 to 2015. [2021-06-05 14:10:47,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 3.08291956305859) internal successors, (6209), 2014 states have internal predecessors, (6209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:47,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 6209 transitions. [2021-06-05 14:10:47,751 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 6209 transitions. Word has length 20 [2021-06-05 14:10:47,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:47,751 INFO L482 AbstractCegarLoop]: Abstraction has 2015 states and 6209 transitions. [2021-06-05 14:10:47,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:47,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 6209 transitions. [2021-06-05 14:10:47,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:10:47,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:47,753 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:47,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39605 [2021-06-05 14:10:47,954 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:47,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:47,954 INFO L82 PathProgramCache]: Analyzing trace with hash 2127854538, now seen corresponding path program 299 times [2021-06-05 14:10:47,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:47,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723993106] [2021-06-05 14:10:47,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:47,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:48,019 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:48,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:48,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723993106] [2021-06-05 14:10:48,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723993106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:48,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150444588] [2021-06-05 14:10:48,019 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 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 14:10:48,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:10:48,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:48,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 14:10:48,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:48,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150444588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:48,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:48,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:10:48,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990887099] [2021-06-05 14:10:48,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:10:48,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:48,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:10:48,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:10:48,086 INFO L87 Difference]: Start difference. First operand 2015 states and 6209 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:48,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:48,293 INFO L93 Difference]: Finished difference Result 2375 states and 7049 transitions. [2021-06-05 14:10:48,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:10:48,294 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:10:48,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:48,296 INFO L225 Difference]: With dead ends: 2375 [2021-06-05 14:10:48,296 INFO L226 Difference]: Without dead ends: 2375 [2021-06-05 14:10:48,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 182.1ms TimeCoverageRelationStatistics Valid=299, Invalid=571, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:10:48,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2375 states. [2021-06-05 14:10:48,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2375 to 2034. [2021-06-05 14:10:48,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 2033 states have (on average 3.0821446138711264) internal successors, (6266), 2033 states have internal predecessors, (6266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:48,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 6266 transitions. [2021-06-05 14:10:48,317 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 6266 transitions. Word has length 20 [2021-06-05 14:10:48,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:48,317 INFO L482 AbstractCegarLoop]: Abstraction has 2034 states and 6266 transitions. [2021-06-05 14:10:48,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:48,317 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 6266 transitions. [2021-06-05 14:10:48,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:10:48,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:48,319 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:48,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39606,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:48,520 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:48,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:48,520 INFO L82 PathProgramCache]: Analyzing trace with hash 248568699, now seen corresponding path program 300 times [2021-06-05 14:10:48,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:48,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411439030] [2021-06-05 14:10:48,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:48,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:48,594 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:48,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:48,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411439030] [2021-06-05 14:10:48,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411439030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:48,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82938409] [2021-06-05 14:10:48,594 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 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 14:10:48,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:10:48,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:48,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:10:48,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:48,665 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:48,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82938409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:48,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:48,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:10:48,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316540553] [2021-06-05 14:10:48,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:10:48,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:48,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:10:48,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:10:48,666 INFO L87 Difference]: Start difference. First operand 2034 states and 6266 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:48,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:48,805 INFO L93 Difference]: Finished difference Result 2216 states and 6557 transitions. [2021-06-05 14:10:48,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:10:48,805 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:10:48,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:48,807 INFO L225 Difference]: With dead ends: 2216 [2021-06-05 14:10:48,807 INFO L226 Difference]: Without dead ends: 2212 [2021-06-05 14:10:48,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 131.7ms TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:10:48,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-06-05 14:10:48,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 2020. [2021-06-05 14:10:48,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 2019 states have (on average 3.0787518573551265) internal successors, (6216), 2019 states have internal predecessors, (6216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:48,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 6216 transitions. [2021-06-05 14:10:48,828 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 6216 transitions. Word has length 21 [2021-06-05 14:10:48,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:48,828 INFO L482 AbstractCegarLoop]: Abstraction has 2020 states and 6216 transitions. [2021-06-05 14:10:48,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:48,828 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 6216 transitions. [2021-06-05 14:10:48,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:10:48,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:48,830 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:49,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39607 [2021-06-05 14:10:49,031 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:49,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:49,031 INFO L82 PathProgramCache]: Analyzing trace with hash 905361256, now seen corresponding path program 301 times [2021-06-05 14:10:49,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:49,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200812814] [2021-06-05 14:10:49,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:49,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:49,127 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:49,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:49,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200812814] [2021-06-05 14:10:49,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200812814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:49,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232575145] [2021-06-05 14:10:49,128 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 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 14:10:49,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:49,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:10:49,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:49,218 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:49,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232575145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:49,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:49,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:10:49,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111097362] [2021-06-05 14:10:49,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:10:49,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:49,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:10:49,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:10:49,219 INFO L87 Difference]: Start difference. First operand 2020 states and 6216 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:49,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:49,485 INFO L93 Difference]: Finished difference Result 2358 states and 6864 transitions. [2021-06-05 14:10:49,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:10:49,485 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:10:49,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:49,487 INFO L225 Difference]: With dead ends: 2358 [2021-06-05 14:10:49,487 INFO L226 Difference]: Without dead ends: 2351 [2021-06-05 14:10:49,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 236.3ms TimeCoverageRelationStatistics Valid=297, Invalid=573, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:10:49,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-06-05 14:10:49,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1996. [2021-06-05 14:10:49,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1996 states, 1995 states have (on average 3.0716791979949876) internal successors, (6128), 1995 states have internal predecessors, (6128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:49,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1996 states to 1996 states and 6128 transitions. [2021-06-05 14:10:49,510 INFO L78 Accepts]: Start accepts. Automaton has 1996 states and 6128 transitions. Word has length 21 [2021-06-05 14:10:49,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:49,510 INFO L482 AbstractCegarLoop]: Abstraction has 1996 states and 6128 transitions. [2021-06-05 14:10:49,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:49,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states and 6128 transitions. [2021-06-05 14:10:49,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:10:49,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:49,512 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:49,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39608 [2021-06-05 14:10:49,712 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:49,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:49,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1825157759, now seen corresponding path program 302 times [2021-06-05 14:10:49,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:49,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142759406] [2021-06-05 14:10:49,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:49,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:49,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:49,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142759406] [2021-06-05 14:10:49,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142759406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:49,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852279958] [2021-06-05 14:10:49,778 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 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 14:10:49,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:10:49,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:49,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:10:49,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:49,850 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:49,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852279958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:49,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:49,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:10:49,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629127063] [2021-06-05 14:10:49,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:10:49,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:49,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:10:49,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:10:49,851 INFO L87 Difference]: Start difference. First operand 1996 states and 6128 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:50,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:50,044 INFO L93 Difference]: Finished difference Result 2055 states and 6217 transitions. [2021-06-05 14:10:50,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:10:50,045 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:10:50,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:50,047 INFO L225 Difference]: With dead ends: 2055 [2021-06-05 14:10:50,047 INFO L226 Difference]: Without dead ends: 2051 [2021-06-05 14:10:50,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 155.5ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:10:50,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-06-05 14:10:50,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1996. [2021-06-05 14:10:50,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1996 states, 1995 states have (on average 3.069674185463659) internal successors, (6124), 1995 states have internal predecessors, (6124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:50,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1996 states to 1996 states and 6124 transitions. [2021-06-05 14:10:50,073 INFO L78 Accepts]: Start accepts. Automaton has 1996 states and 6124 transitions. Word has length 21 [2021-06-05 14:10:50,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:50,073 INFO L482 AbstractCegarLoop]: Abstraction has 1996 states and 6124 transitions. [2021-06-05 14:10:50,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:50,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states and 6124 transitions. [2021-06-05 14:10:50,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:10:50,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:50,075 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:50,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39609,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:50,292 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:50,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:50,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1163893976, now seen corresponding path program 303 times [2021-06-05 14:10:50,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:50,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410628392] [2021-06-05 14:10:50,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:50,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:50,351 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:50,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:50,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410628392] [2021-06-05 14:10:50,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410628392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:50,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635589269] [2021-06-05 14:10:50,352 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 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 14:10:50,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:10:50,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:50,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:10:50,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:50,427 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:50,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635589269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:50,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:50,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:10:50,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221310354] [2021-06-05 14:10:50,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:10:50,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:50,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:10:50,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:10:50,428 INFO L87 Difference]: Start difference. First operand 1996 states and 6124 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:50,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:50,519 INFO L93 Difference]: Finished difference Result 2326 states and 6716 transitions. [2021-06-05 14:10:50,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:10:50,519 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:10:50,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:50,522 INFO L225 Difference]: With dead ends: 2326 [2021-06-05 14:10:50,522 INFO L226 Difference]: Without dead ends: 2326 [2021-06-05 14:10:50,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:10:50,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2326 states. [2021-06-05 14:10:50,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2326 to 1980. [2021-06-05 14:10:50,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1979 states have (on average 3.064679130874179) internal successors, (6065), 1979 states have internal predecessors, (6065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:50,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 6065 transitions. [2021-06-05 14:10:50,547 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 6065 transitions. Word has length 21 [2021-06-05 14:10:50,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:50,548 INFO L482 AbstractCegarLoop]: Abstraction has 1980 states and 6065 transitions. [2021-06-05 14:10:50,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:50,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 6065 transitions. [2021-06-05 14:10:50,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:10:50,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:50,550 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:50,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39610 [2021-06-05 14:10:50,750 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:50,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:50,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1822635909, now seen corresponding path program 304 times [2021-06-05 14:10:50,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:50,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387920325] [2021-06-05 14:10:50,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:50,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:50,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:50,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387920325] [2021-06-05 14:10:50,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387920325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:50,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169708627] [2021-06-05 14:10:50,811 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 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 14:10:50,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:10:50,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:50,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:10:50,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:50,885 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:50,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169708627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:50,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:50,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:10:50,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217769177] [2021-06-05 14:10:50,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:10:50,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:50,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:10:50,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:10:50,886 INFO L87 Difference]: Start difference. First operand 1980 states and 6065 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:51,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:51,011 INFO L93 Difference]: Finished difference Result 2084 states and 6271 transitions. [2021-06-05 14:10:51,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:10:51,011 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:10:51,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:51,013 INFO L225 Difference]: With dead ends: 2084 [2021-06-05 14:10:51,013 INFO L226 Difference]: Without dead ends: 2076 [2021-06-05 14:10:51,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 101.7ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:10:51,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2021-06-05 14:10:51,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 1988. [2021-06-05 14:10:51,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 3.06341217916457) internal successors, (6087), 1987 states have internal predecessors, (6087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:51,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 6087 transitions. [2021-06-05 14:10:51,036 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 6087 transitions. Word has length 21 [2021-06-05 14:10:51,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:51,037 INFO L482 AbstractCegarLoop]: Abstraction has 1988 states and 6087 transitions. [2021-06-05 14:10:51,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:51,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 6087 transitions. [2021-06-05 14:10:51,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:10:51,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:51,039 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:51,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39611,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:51,242 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:51,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:51,243 INFO L82 PathProgramCache]: Analyzing trace with hash -865456514, now seen corresponding path program 305 times [2021-06-05 14:10:51,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:51,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210814600] [2021-06-05 14:10:51,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:51,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:51,303 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:51,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:51,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210814600] [2021-06-05 14:10:51,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210814600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:51,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253764413] [2021-06-05 14:10:51,303 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 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 14:10:51,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:10:51,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:51,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:10:51,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:51,381 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:51,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253764413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:51,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:51,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 14:10:51,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499241547] [2021-06-05 14:10:51,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:10:51,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:51,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:10:51,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:10:51,382 INFO L87 Difference]: Start difference. First operand 1988 states and 6087 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:51,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:51,479 INFO L93 Difference]: Finished difference Result 2431 states and 6990 transitions. [2021-06-05 14:10:51,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:10:51,480 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:10:51,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:51,482 INFO L225 Difference]: With dead ends: 2431 [2021-06-05 14:10:51,482 INFO L226 Difference]: Without dead ends: 2431 [2021-06-05 14:10:51,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:10:51,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2021-06-05 14:10:51,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 1991. [2021-06-05 14:10:51,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1991 states, 1990 states have (on average 3.063819095477387) internal successors, (6097), 1990 states have internal predecessors, (6097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:51,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 6097 transitions. [2021-06-05 14:10:51,503 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 6097 transitions. Word has length 21 [2021-06-05 14:10:51,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:51,503 INFO L482 AbstractCegarLoop]: Abstraction has 1991 states and 6097 transitions. [2021-06-05 14:10:51,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:51,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 6097 transitions. [2021-06-05 14:10:51,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:10:51,505 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:51,505 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:51,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39612 [2021-06-05 14:10:51,706 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:51,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:51,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1059877375, now seen corresponding path program 306 times [2021-06-05 14:10:51,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:51,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210536683] [2021-06-05 14:10:51,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:51,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:51,764 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:51,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:51,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210536683] [2021-06-05 14:10:51,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210536683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:51,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106365733] [2021-06-05 14:10:51,764 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 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 14:10:51,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:10:51,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:51,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:10:51,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:51,828 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:51,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106365733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:51,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:51,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:10:51,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002192742] [2021-06-05 14:10:51,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:10:51,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:51,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:10:51,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:10:51,829 INFO L87 Difference]: Start difference. First operand 1991 states and 6097 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:51,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:51,957 INFO L93 Difference]: Finished difference Result 2098 states and 6296 transitions. [2021-06-05 14:10:51,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:10:51,957 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:10:51,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:51,959 INFO L225 Difference]: With dead ends: 2098 [2021-06-05 14:10:51,959 INFO L226 Difference]: Without dead ends: 2086 [2021-06-05 14:10:51,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 85.7ms TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:10:51,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2021-06-05 14:10:51,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 1993. [2021-06-05 14:10:51,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1993 states, 1992 states have (on average 3.0607429718875503) internal successors, (6097), 1992 states have internal predecessors, (6097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:51,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1993 states to 1993 states and 6097 transitions. [2021-06-05 14:10:51,979 INFO L78 Accepts]: Start accepts. Automaton has 1993 states and 6097 transitions. Word has length 21 [2021-06-05 14:10:51,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:51,979 INFO L482 AbstractCegarLoop]: Abstraction has 1993 states and 6097 transitions. [2021-06-05 14:10:51,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:51,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1993 states and 6097 transitions. [2021-06-05 14:10:51,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:10:51,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:51,981 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:52,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39613 [2021-06-05 14:10:52,182 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:52,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:52,182 INFO L82 PathProgramCache]: Analyzing trace with hash 649187736, now seen corresponding path program 307 times [2021-06-05 14:10:52,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:52,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269453887] [2021-06-05 14:10:52,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:52,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:52,245 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:52,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:52,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269453887] [2021-06-05 14:10:52,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269453887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:52,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631879539] [2021-06-05 14:10:52,245 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 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 14:10:52,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:52,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:10:52,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:52,317 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:52,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631879539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:52,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:52,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:10:52,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255197555] [2021-06-05 14:10:52,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:10:52,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:52,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:10:52,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:10:52,318 INFO L87 Difference]: Start difference. First operand 1993 states and 6097 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:52,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:52,442 INFO L93 Difference]: Finished difference Result 2545 states and 7306 transitions. [2021-06-05 14:10:52,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:10:52,442 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:10:52,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:52,445 INFO L225 Difference]: With dead ends: 2545 [2021-06-05 14:10:52,445 INFO L226 Difference]: Without dead ends: 2545 [2021-06-05 14:10:52,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:10:52,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2545 states. [2021-06-05 14:10:52,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2545 to 1996. [2021-06-05 14:10:52,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1996 states, 1995 states have (on average 3.0606516290726815) internal successors, (6106), 1995 states have internal predecessors, (6106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:52,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1996 states to 1996 states and 6106 transitions. [2021-06-05 14:10:52,480 INFO L78 Accepts]: Start accepts. Automaton has 1996 states and 6106 transitions. Word has length 21 [2021-06-05 14:10:52,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:52,480 INFO L482 AbstractCegarLoop]: Abstraction has 1996 states and 6106 transitions. [2021-06-05 14:10:52,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:52,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states and 6106 transitions. [2021-06-05 14:10:52,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:10:52,482 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:52,482 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:52,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39614 [2021-06-05 14:10:52,682 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:52,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:52,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1454406011, now seen corresponding path program 308 times [2021-06-05 14:10:52,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:52,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635177490] [2021-06-05 14:10:52,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:52,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:52,724 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:10:52,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:52,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635177490] [2021-06-05 14:10:52,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635177490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:52,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228557682] [2021-06-05 14:10:52,724 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 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 14:10:52,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:10:52,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:52,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:10:52,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:10:52,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228557682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:52,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:52,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:10:52,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26690287] [2021-06-05 14:10:52,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:10:52,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:52,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:10:52,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:10:52,787 INFO L87 Difference]: Start difference. First operand 1996 states and 6106 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:52,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:52,857 INFO L93 Difference]: Finished difference Result 2246 states and 6593 transitions. [2021-06-05 14:10:52,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:10:52,858 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 14:10:52,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:52,860 INFO L225 Difference]: With dead ends: 2246 [2021-06-05 14:10:52,860 INFO L226 Difference]: Without dead ends: 2244 [2021-06-05 14:10:52,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:10:52,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2021-06-05 14:10:52,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 2004. [2021-06-05 14:10:52,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2004 states, 2003 states have (on average 3.050424363454818) internal successors, (6110), 2003 states have internal predecessors, (6110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:52,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 6110 transitions. [2021-06-05 14:10:52,882 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 6110 transitions. Word has length 21 [2021-06-05 14:10:52,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:52,882 INFO L482 AbstractCegarLoop]: Abstraction has 2004 states and 6110 transitions. [2021-06-05 14:10:52,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:52,882 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 6110 transitions. [2021-06-05 14:10:52,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:10:52,884 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:52,884 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:53,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39615 [2021-06-05 14:10:53,085 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:53,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:53,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1535536296, now seen corresponding path program 309 times [2021-06-05 14:10:53,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:53,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724182128] [2021-06-05 14:10:53,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:53,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:53,133 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:10:53,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:53,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724182128] [2021-06-05 14:10:53,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724182128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:53,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229443833] [2021-06-05 14:10:53,133 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 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 14:10:53,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:10:53,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:53,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:10:53,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:53,203 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:10:53,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229443833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:53,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:53,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:10:53,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761513257] [2021-06-05 14:10:53,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:10:53,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:53,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:10:53,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:10:53,204 INFO L87 Difference]: Start difference. First operand 2004 states and 6110 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:53,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:53,356 INFO L93 Difference]: Finished difference Result 2256 states and 6538 transitions. [2021-06-05 14:10:53,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:10:53,357 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 14:10:53,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:53,360 INFO L225 Difference]: With dead ends: 2256 [2021-06-05 14:10:53,360 INFO L226 Difference]: Without dead ends: 2254 [2021-06-05 14:10:53,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 96.6ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:10:53,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-06-05 14:10:53,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 2016. [2021-06-05 14:10:53,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2016 states, 2015 states have (on average 3.04863523573201) internal successors, (6143), 2015 states have internal predecessors, (6143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:53,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 6143 transitions. [2021-06-05 14:10:53,390 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 6143 transitions. Word has length 21 [2021-06-05 14:10:53,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:53,390 INFO L482 AbstractCegarLoop]: Abstraction has 2016 states and 6143 transitions. [2021-06-05 14:10:53,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:53,390 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 6143 transitions. [2021-06-05 14:10:53,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:10:53,392 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:53,392 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:53,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39616,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:53,610 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:53,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:53,611 INFO L82 PathProgramCache]: Analyzing trace with hash 327009918, now seen corresponding path program 310 times [2021-06-05 14:10:53,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:53,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419661077] [2021-06-05 14:10:53,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:53,684 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:53,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:53,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419661077] [2021-06-05 14:10:53,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419661077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:53,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86857413] [2021-06-05 14:10:53,684 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 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 14:10:53,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:10:53,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:53,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:10:53,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:53,756 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:10:53,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86857413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:53,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:53,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:10:53,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701015912] [2021-06-05 14:10:53,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:10:53,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:53,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:10:53,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:10:53,757 INFO L87 Difference]: Start difference. First operand 2016 states and 6143 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:53,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:53,848 INFO L93 Difference]: Finished difference Result 2369 states and 6830 transitions. [2021-06-05 14:10:53,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:10:53,849 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 14:10:53,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:53,852 INFO L225 Difference]: With dead ends: 2369 [2021-06-05 14:10:53,852 INFO L226 Difference]: Without dead ends: 2369 [2021-06-05 14:10:53,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:10:53,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2369 states. [2021-06-05 14:10:53,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2369 to 2015. [2021-06-05 14:10:53,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 3.048162859980139) internal successors, (6139), 2014 states have internal predecessors, (6139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:53,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 6139 transitions. [2021-06-05 14:10:53,883 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 6139 transitions. Word has length 21 [2021-06-05 14:10:53,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:53,883 INFO L482 AbstractCegarLoop]: Abstraction has 2015 states and 6139 transitions. [2021-06-05 14:10:53,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:53,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 6139 transitions. [2021-06-05 14:10:53,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:10:53,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:53,886 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:54,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39617 [2021-06-05 14:10:54,108 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:54,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:54,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1275555135, now seen corresponding path program 311 times [2021-06-05 14:10:54,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:54,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082126047] [2021-06-05 14:10:54,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:54,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:54,172 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:54,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:54,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082126047] [2021-06-05 14:10:54,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082126047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:54,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591646020] [2021-06-05 14:10:54,172 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 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 14:10:54,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 14:10:54,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:54,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:10:54,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:54,245 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:54,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591646020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:54,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:54,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:10:54,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069318087] [2021-06-05 14:10:54,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:10:54,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:54,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:10:54,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:10:54,246 INFO L87 Difference]: Start difference. First operand 2015 states and 6139 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:54,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:54,399 INFO L93 Difference]: Finished difference Result 2175 states and 6426 transitions. [2021-06-05 14:10:54,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:10:54,399 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:10:54,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:54,402 INFO L225 Difference]: With dead ends: 2175 [2021-06-05 14:10:54,402 INFO L226 Difference]: Without dead ends: 2157 [2021-06-05 14:10:54,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 107.3ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:10:54,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2021-06-05 14:10:54,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 1987. [2021-06-05 14:10:54,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1987 states, 1986 states have (on average 3.0463242698892246) internal successors, (6050), 1986 states have internal predecessors, (6050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:54,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 6050 transitions. [2021-06-05 14:10:54,430 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 6050 transitions. Word has length 21 [2021-06-05 14:10:54,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:54,430 INFO L482 AbstractCegarLoop]: Abstraction has 1987 states and 6050 transitions. [2021-06-05 14:10:54,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:54,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 6050 transitions. [2021-06-05 14:10:54,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:10:54,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:54,432 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:54,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39618 [2021-06-05 14:10:54,649 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:54,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:54,649 INFO L82 PathProgramCache]: Analyzing trace with hash 864865496, now seen corresponding path program 312 times [2021-06-05 14:10:54,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:54,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446713679] [2021-06-05 14:10:54,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:54,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:54,710 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:54,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:54,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446713679] [2021-06-05 14:10:54,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446713679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:54,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004204515] [2021-06-05 14:10:54,710 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 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 14:10:54,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:10:54,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:54,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:10:54,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:54,811 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:54,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004204515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:54,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:54,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:10:54,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407190066] [2021-06-05 14:10:54,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:10:54,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:54,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:10:54,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:10:54,813 INFO L87 Difference]: Start difference. First operand 1987 states and 6050 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:54,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:54,924 INFO L93 Difference]: Finished difference Result 2488 states and 7125 transitions. [2021-06-05 14:10:54,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:10:54,924 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:10:54,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:54,926 INFO L225 Difference]: With dead ends: 2488 [2021-06-05 14:10:54,926 INFO L226 Difference]: Without dead ends: 2488 [2021-06-05 14:10:54,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 97.5ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:10:54,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2021-06-05 14:10:54,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 1994. [2021-06-05 14:10:54,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1993 states have (on average 3.046161565479177) internal successors, (6071), 1993 states have internal predecessors, (6071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:54,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 6071 transitions. [2021-06-05 14:10:54,948 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 6071 transitions. Word has length 21 [2021-06-05 14:10:54,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:54,948 INFO L482 AbstractCegarLoop]: Abstraction has 1994 states and 6071 transitions. [2021-06-05 14:10:54,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:54,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 6071 transitions. [2021-06-05 14:10:54,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:10:54,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:54,949 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:55,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39619,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:55,150 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:55,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:55,150 INFO L82 PathProgramCache]: Analyzing trace with hash 223475963, now seen corresponding path program 313 times [2021-06-05 14:10:55,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:55,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475985740] [2021-06-05 14:10:55,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:55,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:55,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475985740] [2021-06-05 14:10:55,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475985740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:55,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521362262] [2021-06-05 14:10:55,232 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 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 14:10:55,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:55,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:10:55,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:55,293 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:55,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521362262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:55,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:55,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:10:55,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96818856] [2021-06-05 14:10:55,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:10:55,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:55,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:10:55,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:10:55,294 INFO L87 Difference]: Start difference. First operand 1994 states and 6071 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:55,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:55,421 INFO L93 Difference]: Finished difference Result 2166 states and 6392 transitions. [2021-06-05 14:10:55,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:10:55,421 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:10:55,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:55,424 INFO L225 Difference]: With dead ends: 2166 [2021-06-05 14:10:55,424 INFO L226 Difference]: Without dead ends: 2158 [2021-06-05 14:10:55,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 104.8ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:10:55,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2021-06-05 14:10:55,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 2000. [2021-06-05 14:10:55,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2000 states, 1999 states have (on average 3.0400200100050023) internal successors, (6077), 1999 states have internal predecessors, (6077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:55,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 6077 transitions. [2021-06-05 14:10:55,444 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 6077 transitions. Word has length 21 [2021-06-05 14:10:55,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:55,444 INFO L482 AbstractCegarLoop]: Abstraction has 2000 states and 6077 transitions. [2021-06-05 14:10:55,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:55,444 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 6077 transitions. [2021-06-05 14:10:55,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:10:55,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:55,446 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:55,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39620,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:55,647 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:55,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:55,647 INFO L82 PathProgramCache]: Analyzing trace with hash 358519230, now seen corresponding path program 314 times [2021-06-05 14:10:55,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:55,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307685093] [2021-06-05 14:10:55,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:55,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:55,702 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:55,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:55,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307685093] [2021-06-05 14:10:55,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307685093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:55,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508285846] [2021-06-05 14:10:55,703 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 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 14:10:55,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:10:55,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:55,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:10:55,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:55,771 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:55,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508285846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:55,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:55,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:10:55,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762832954] [2021-06-05 14:10:55,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:10:55,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:55,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:10:55,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:10:55,772 INFO L87 Difference]: Start difference. First operand 2000 states and 6077 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:55,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:55,924 INFO L93 Difference]: Finished difference Result 2684 states and 7629 transitions. [2021-06-05 14:10:55,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:10:55,924 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:10:55,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:55,926 INFO L225 Difference]: With dead ends: 2684 [2021-06-05 14:10:55,926 INFO L226 Difference]: Without dead ends: 2684 [2021-06-05 14:10:55,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 120.8ms TimeCoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:10:55,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2684 states. [2021-06-05 14:10:55,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2684 to 1877. [2021-06-05 14:10:55,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1876 states have (on average 3.031449893390192) internal successors, (5687), 1876 states have internal predecessors, (5687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:55,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 5687 transitions. [2021-06-05 14:10:55,947 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 5687 transitions. Word has length 21 [2021-06-05 14:10:55,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:55,948 INFO L482 AbstractCegarLoop]: Abstraction has 1877 states and 5687 transitions. [2021-06-05 14:10:55,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:55,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 5687 transitions. [2021-06-05 14:10:55,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:10:55,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:55,949 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:56,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39621,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:56,150 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:56,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:56,150 INFO L82 PathProgramCache]: Analyzing trace with hash -449518021, now seen corresponding path program 315 times [2021-06-05 14:10:56,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:56,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640040133] [2021-06-05 14:10:56,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:56,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:56,193 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:10:56,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:56,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640040133] [2021-06-05 14:10:56,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640040133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:56,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752953557] [2021-06-05 14:10:56,193 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 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 14:10:56,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:10:56,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:56,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:10:56,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:56,257 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:10:56,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752953557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:56,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:56,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:10:56,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950332886] [2021-06-05 14:10:56,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:10:56,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:56,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:10:56,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:10:56,258 INFO L87 Difference]: Start difference. First operand 1877 states and 5687 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:56,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:56,346 INFO L93 Difference]: Finished difference Result 2128 states and 6179 transitions. [2021-06-05 14:10:56,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:10:56,347 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 14:10:56,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:56,349 INFO L225 Difference]: With dead ends: 2128 [2021-06-05 14:10:56,349 INFO L226 Difference]: Without dead ends: 2126 [2021-06-05 14:10:56,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:10:56,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2021-06-05 14:10:56,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1878. [2021-06-05 14:10:56,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1877 states have (on average 3.0261054874800215) internal successors, (5680), 1877 states have internal predecessors, (5680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:56,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 5680 transitions. [2021-06-05 14:10:56,376 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 5680 transitions. Word has length 21 [2021-06-05 14:10:56,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:56,377 INFO L482 AbstractCegarLoop]: Abstraction has 1878 states and 5680 transitions. [2021-06-05 14:10:56,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:56,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 5680 transitions. [2021-06-05 14:10:56,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:10:56,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:56,379 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:56,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39622,324 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:56,585 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:56,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:56,585 INFO L82 PathProgramCache]: Analyzing trace with hash -368387736, now seen corresponding path program 316 times [2021-06-05 14:10:56,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:56,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165617370] [2021-06-05 14:10:56,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:56,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:56,630 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:10:56,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:56,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165617370] [2021-06-05 14:10:56,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165617370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:56,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768859639] [2021-06-05 14:10:56,631 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 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 14:10:56,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:10:56,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:56,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:10:56,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:56,724 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:10:56,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768859639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:56,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:56,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:10:56,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533999610] [2021-06-05 14:10:56,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:10:56,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:56,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:10:56,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:10:56,725 INFO L87 Difference]: Start difference. First operand 1878 states and 5680 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:56,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:56,866 INFO L93 Difference]: Finished difference Result 2105 states and 6036 transitions. [2021-06-05 14:10:56,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:10:56,866 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 14:10:56,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:56,868 INFO L225 Difference]: With dead ends: 2105 [2021-06-05 14:10:56,868 INFO L226 Difference]: Without dead ends: 2103 [2021-06-05 14:10:56,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:10:56,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2103 states. [2021-06-05 14:10:56,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2103 to 1878. [2021-06-05 14:10:56,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1877 states have (on average 3.0218433670751197) internal successors, (5672), 1877 states have internal predecessors, (5672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:56,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 5672 transitions. [2021-06-05 14:10:56,896 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 5672 transitions. Word has length 21 [2021-06-05 14:10:56,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:56,896 INFO L482 AbstractCegarLoop]: Abstraction has 1878 states and 5672 transitions. [2021-06-05 14:10:56,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:56,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 5672 transitions. [2021-06-05 14:10:56,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:10:56,898 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:56,898 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:57,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39623 [2021-06-05 14:10:57,121 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:57,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:57,121 INFO L82 PathProgramCache]: Analyzing trace with hash -628368897, now seen corresponding path program 317 times [2021-06-05 14:10:57,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:57,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188704921] [2021-06-05 14:10:57,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:57,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:57,208 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:57,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:57,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188704921] [2021-06-05 14:10:57,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188704921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:57,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343826148] [2021-06-05 14:10:57,209 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 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 14:10:57,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 14:10:57,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:57,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:10:57,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:57,279 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:57,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343826148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:57,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:57,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:10:57,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721710739] [2021-06-05 14:10:57,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:10:57,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:57,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:10:57,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:10:57,280 INFO L87 Difference]: Start difference. First operand 1878 states and 5672 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:57,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:57,444 INFO L93 Difference]: Finished difference Result 2035 states and 5959 transitions. [2021-06-05 14:10:57,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:10:57,445 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:10:57,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:57,448 INFO L225 Difference]: With dead ends: 2035 [2021-06-05 14:10:57,448 INFO L226 Difference]: Without dead ends: 2021 [2021-06-05 14:10:57,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 115.0ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:10:57,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2021-06-05 14:10:57,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 1848. [2021-06-05 14:10:57,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 3.0211153221440172) internal successors, (5580), 1847 states have internal predecessors, (5580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:57,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 5580 transitions. [2021-06-05 14:10:57,475 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 5580 transitions. Word has length 21 [2021-06-05 14:10:57,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:57,476 INFO L482 AbstractCegarLoop]: Abstraction has 1848 states and 5580 transitions. [2021-06-05 14:10:57,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:57,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 5580 transitions. [2021-06-05 14:10:57,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:10:57,478 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:57,478 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:57,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39624 [2021-06-05 14:10:57,679 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:57,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:57,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1039058536, now seen corresponding path program 318 times [2021-06-05 14:10:57,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:57,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930904529] [2021-06-05 14:10:57,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:57,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:57,740 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:57,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:57,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930904529] [2021-06-05 14:10:57,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930904529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:57,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104565285] [2021-06-05 14:10:57,741 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 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 14:10:57,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:10:57,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:57,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:10:57,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:57,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104565285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:57,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:57,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:10:57,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154969934] [2021-06-05 14:10:57,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:10:57,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:57,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:10:57,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:10:57,816 INFO L87 Difference]: Start difference. First operand 1848 states and 5580 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:57,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:57,924 INFO L93 Difference]: Finished difference Result 2226 states and 6355 transitions. [2021-06-05 14:10:57,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:10:57,924 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:10:57,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:57,926 INFO L225 Difference]: With dead ends: 2226 [2021-06-05 14:10:57,927 INFO L226 Difference]: Without dead ends: 2226 [2021-06-05 14:10:57,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:10:57,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-06-05 14:10:57,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1837. [2021-06-05 14:10:57,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 3.017429193899782) internal successors, (5540), 1836 states have internal predecessors, (5540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:57,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 5540 transitions. [2021-06-05 14:10:57,962 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 5540 transitions. Word has length 21 [2021-06-05 14:10:57,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:57,962 INFO L482 AbstractCegarLoop]: Abstraction has 1837 states and 5540 transitions. [2021-06-05 14:10:57,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:57,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 5540 transitions. [2021-06-05 14:10:57,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:10:57,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:57,964 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:58,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39625 [2021-06-05 14:10:58,184 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:58,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:58,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1680448069, now seen corresponding path program 319 times [2021-06-05 14:10:58,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:58,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093766966] [2021-06-05 14:10:58,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:58,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:58,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:58,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093766966] [2021-06-05 14:10:58,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093766966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:58,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488462927] [2021-06-05 14:10:58,247 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 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 14:10:58,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:58,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:10:58,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:58,325 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:58,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488462927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:58,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:58,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:10:58,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346514787] [2021-06-05 14:10:58,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:10:58,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:58,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:10:58,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:10:58,326 INFO L87 Difference]: Start difference. First operand 1837 states and 5540 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:58,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:58,501 INFO L93 Difference]: Finished difference Result 2036 states and 5912 transitions. [2021-06-05 14:10:58,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:10:58,501 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:10:58,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:58,504 INFO L225 Difference]: With dead ends: 2036 [2021-06-05 14:10:58,504 INFO L226 Difference]: Without dead ends: 2028 [2021-06-05 14:10:58,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 119.8ms TimeCoverageRelationStatistics Valid=172, Invalid=334, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:10:58,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2028 states. [2021-06-05 14:10:58,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2028 to 1837. [2021-06-05 14:10:58,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 3.0152505446623095) internal successors, (5536), 1836 states have internal predecessors, (5536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:58,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 5536 transitions. [2021-06-05 14:10:58,542 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 5536 transitions. Word has length 21 [2021-06-05 14:10:58,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:58,542 INFO L482 AbstractCegarLoop]: Abstraction has 1837 states and 5536 transitions. [2021-06-05 14:10:58,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:58,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 5536 transitions. [2021-06-05 14:10:58,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:10:58,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:58,545 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:58,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39626,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:10:58,767 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:58,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:58,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1545404802, now seen corresponding path program 320 times [2021-06-05 14:10:58,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:58,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203045876] [2021-06-05 14:10:58,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:58,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:58,836 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:58,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:58,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203045876] [2021-06-05 14:10:58,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203045876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:58,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180799483] [2021-06-05 14:10:58,837 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 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 14:10:58,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:10:58,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:58,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:10:58,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:58,927 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:58,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180799483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:58,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:58,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:10:58,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073616020] [2021-06-05 14:10:58,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:10:58,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:58,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:10:58,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:10:58,928 INFO L87 Difference]: Start difference. First operand 1837 states and 5536 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:59,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:59,082 INFO L93 Difference]: Finished difference Result 2364 states and 6697 transitions. [2021-06-05 14:10:59,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:10:59,083 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:10:59,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:59,085 INFO L225 Difference]: With dead ends: 2364 [2021-06-05 14:10:59,085 INFO L226 Difference]: Without dead ends: 2364 [2021-06-05 14:10:59,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=181, Invalid=325, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:10:59,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2021-06-05 14:10:59,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 1754. [2021-06-05 14:10:59,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1754 states, 1753 states have (on average 3.0119794637763833) internal successors, (5280), 1753 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:59,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 5280 transitions. [2021-06-05 14:10:59,111 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 5280 transitions. Word has length 21 [2021-06-05 14:10:59,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:59,111 INFO L482 AbstractCegarLoop]: Abstraction has 1754 states and 5280 transitions. [2021-06-05 14:10:59,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:59,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 5280 transitions. [2021-06-05 14:10:59,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:10:59,113 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:59,113 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:10:59,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39627 [2021-06-05 14:10:59,336 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:10:59,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:10:59,336 INFO L82 PathProgramCache]: Analyzing trace with hash 64835967, now seen corresponding path program 321 times [2021-06-05 14:10:59,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:10:59,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875289826] [2021-06-05 14:10:59,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:10:59,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:10:59,426 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:59,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:10:59,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875289826] [2021-06-05 14:10:59,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875289826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:59,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265626733] [2021-06-05 14:10:59,427 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 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 14:10:59,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:10:59,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:10:59,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:10:59,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:10:59,503 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:10:59,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265626733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:10:59,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:10:59,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:10:59,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488269007] [2021-06-05 14:10:59,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:10:59,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:10:59,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:10:59,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:10:59,505 INFO L87 Difference]: Start difference. First operand 1754 states and 5280 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:59,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:10:59,845 INFO L93 Difference]: Finished difference Result 2020 states and 5847 transitions. [2021-06-05 14:10:59,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:10:59,846 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:10:59,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:10:59,848 INFO L225 Difference]: With dead ends: 2020 [2021-06-05 14:10:59,848 INFO L226 Difference]: Without dead ends: 2010 [2021-06-05 14:10:59,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 180.3ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:10:59,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2010 states. [2021-06-05 14:10:59,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2010 to 1756. [2021-06-05 14:10:59,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1756 states, 1755 states have (on average 3.0091168091168092) internal successors, (5281), 1755 states have internal predecessors, (5281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:59,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 5281 transitions. [2021-06-05 14:10:59,871 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 5281 transitions. Word has length 21 [2021-06-05 14:10:59,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:10:59,871 INFO L482 AbstractCegarLoop]: Abstraction has 1756 states and 5281 transitions. [2021-06-05 14:10:59,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:10:59,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 5281 transitions. [2021-06-05 14:10:59,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:10:59,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:10:59,873 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:00,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39628,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:00,096 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:00,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:00,097 INFO L82 PathProgramCache]: Analyzing trace with hash -62269864, now seen corresponding path program 322 times [2021-06-05 14:11:00,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:00,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581907671] [2021-06-05 14:11:00,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:00,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:00,160 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:00,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:00,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581907671] [2021-06-05 14:11:00,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581907671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:00,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050879702] [2021-06-05 14:11:00,161 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 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 14:11:00,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:11:00,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:00,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:00,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:00,240 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:00,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050879702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:00,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:00,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:11:00,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154070579] [2021-06-05 14:11:00,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:11:00,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:00,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:11:00,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:11:00,241 INFO L87 Difference]: Start difference. First operand 1756 states and 5281 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:00,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:00,467 INFO L93 Difference]: Finished difference Result 3174 states and 9068 transitions. [2021-06-05 14:11:00,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:11:00,467 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:00,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:00,471 INFO L225 Difference]: With dead ends: 3174 [2021-06-05 14:11:00,471 INFO L226 Difference]: Without dead ends: 3174 [2021-06-05 14:11:00,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 176.0ms TimeCoverageRelationStatistics Valid=263, Invalid=493, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:11:00,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3174 states. [2021-06-05 14:11:00,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3174 to 1885. [2021-06-05 14:11:00,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1884 states have (on average 3.0031847133757963) internal successors, (5658), 1884 states have internal predecessors, (5658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:00,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 5658 transitions. [2021-06-05 14:11:00,504 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 5658 transitions. Word has length 21 [2021-06-05 14:11:00,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:00,504 INFO L482 AbstractCegarLoop]: Abstraction has 1885 states and 5658 transitions. [2021-06-05 14:11:00,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:00,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 5658 transitions. [2021-06-05 14:11:00,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:00,506 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:00,506 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:00,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39629 [2021-06-05 14:11:00,717 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:00,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:00,717 INFO L82 PathProgramCache]: Analyzing trace with hash 658379131, now seen corresponding path program 323 times [2021-06-05 14:11:00,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:00,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755391981] [2021-06-05 14:11:00,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:00,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:00,763 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:11:00,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:00,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755391981] [2021-06-05 14:11:00,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755391981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:00,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886948555] [2021-06-05 14:11:00,764 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 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 14:11:00,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:11:00,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:00,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:00,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:00,838 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:11:00,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886948555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:00,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:00,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:11:00,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172169213] [2021-06-05 14:11:00,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:11:00,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:00,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:11:00,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:11:00,839 INFO L87 Difference]: Start difference. First operand 1885 states and 5658 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:00,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:00,922 INFO L93 Difference]: Finished difference Result 2149 states and 6166 transitions. [2021-06-05 14:11:00,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:11:00,923 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 14:11:00,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:00,925 INFO L225 Difference]: With dead ends: 2149 [2021-06-05 14:11:00,925 INFO L226 Difference]: Without dead ends: 2147 [2021-06-05 14:11:00,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 47.0ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:11:00,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2147 states. [2021-06-05 14:11:00,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2147 to 1876. [2021-06-05 14:11:00,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 2.9994666666666667) internal successors, (5624), 1875 states have internal predecessors, (5624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:00,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 5624 transitions. [2021-06-05 14:11:00,949 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 5624 transitions. Word has length 21 [2021-06-05 14:11:00,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:00,949 INFO L482 AbstractCegarLoop]: Abstraction has 1876 states and 5624 transitions. [2021-06-05 14:11:00,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:00,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 5624 transitions. [2021-06-05 14:11:00,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:00,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:00,951 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:01,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39630,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:01,165 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:01,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:01,165 INFO L82 PathProgramCache]: Analyzing trace with hash 739509416, now seen corresponding path program 324 times [2021-06-05 14:11:01,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:01,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564262106] [2021-06-05 14:11:01,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:01,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:01,208 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:11:01,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:01,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564262106] [2021-06-05 14:11:01,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564262106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:01,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214678164] [2021-06-05 14:11:01,209 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 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 14:11:01,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:11:01,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:01,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:01,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:01,279 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:11:01,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214678164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:01,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:01,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:11:01,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155987675] [2021-06-05 14:11:01,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:11:01,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:01,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:11:01,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:11:01,280 INFO L87 Difference]: Start difference. First operand 1876 states and 5624 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:01,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:01,969 INFO L93 Difference]: Finished difference Result 2097 states and 6031 transitions. [2021-06-05 14:11:01,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:11:01,970 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 14:11:01,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:01,972 INFO L225 Difference]: With dead ends: 2097 [2021-06-05 14:11:01,972 INFO L226 Difference]: Without dead ends: 2095 [2021-06-05 14:11:01,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 461.6ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:11:01,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2021-06-05 14:11:01,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 1899. [2021-06-05 14:11:01,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1899 states, 1898 states have (on average 3.0010537407797684) internal successors, (5696), 1898 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:01,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 5696 transitions. [2021-06-05 14:11:01,999 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 5696 transitions. Word has length 21 [2021-06-05 14:11:02,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:02,000 INFO L482 AbstractCegarLoop]: Abstraction has 1899 states and 5696 transitions. [2021-06-05 14:11:02,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:02,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 5696 transitions. [2021-06-05 14:11:02,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:02,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:02,002 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:02,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39631,333 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:02,225 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:02,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:02,226 INFO L82 PathProgramCache]: Analyzing trace with hash 479528255, now seen corresponding path program 325 times [2021-06-05 14:11:02,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:02,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683799602] [2021-06-05 14:11:02,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:02,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:02,287 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:11:02,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:02,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683799602] [2021-06-05 14:11:02,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683799602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:02,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88980687] [2021-06-05 14:11:02,288 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 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 14:11:02,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:02,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:02,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:02,354 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:11:02,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88980687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:02,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:02,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:11:02,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643787427] [2021-06-05 14:11:02,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:11:02,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:02,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:11:02,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:11:02,355 INFO L87 Difference]: Start difference. First operand 1899 states and 5696 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:02,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:02,527 INFO L93 Difference]: Finished difference Result 2154 states and 6140 transitions. [2021-06-05 14:11:02,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:11:02,528 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:02,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:02,530 INFO L225 Difference]: With dead ends: 2154 [2021-06-05 14:11:02,530 INFO L226 Difference]: Without dead ends: 2136 [2021-06-05 14:11:02,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:11:02,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-06-05 14:11:02,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 1861. [2021-06-05 14:11:02,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1861 states, 1860 states have (on average 2.9935483870967743) internal successors, (5568), 1860 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:02,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1861 states to 1861 states and 5568 transitions. [2021-06-05 14:11:02,554 INFO L78 Accepts]: Start accepts. Automaton has 1861 states and 5568 transitions. Word has length 21 [2021-06-05 14:11:02,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:02,555 INFO L482 AbstractCegarLoop]: Abstraction has 1861 states and 5568 transitions. [2021-06-05 14:11:02,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:02,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1861 states and 5568 transitions. [2021-06-05 14:11:02,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:02,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:02,557 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:02,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39632,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:02,765 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:02,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:02,765 INFO L82 PathProgramCache]: Analyzing trace with hash -572550917, now seen corresponding path program 326 times [2021-06-05 14:11:02,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:02,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702527108] [2021-06-05 14:11:02,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:02,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:02,833 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:02,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:02,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702527108] [2021-06-05 14:11:02,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702527108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:02,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512350492] [2021-06-05 14:11:02,833 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 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 14:11:02,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:11:02,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:02,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:02,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:02,900 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:02,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512350492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:02,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:02,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:11:02,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833666109] [2021-06-05 14:11:02,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:11:02,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:02,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:11:02,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:11:02,901 INFO L87 Difference]: Start difference. First operand 1861 states and 5568 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:03,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:03,101 INFO L93 Difference]: Finished difference Result 2057 states and 5928 transitions. [2021-06-05 14:11:03,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:11:03,101 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:03,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:03,104 INFO L225 Difference]: With dead ends: 2057 [2021-06-05 14:11:03,104 INFO L226 Difference]: Without dead ends: 2041 [2021-06-05 14:11:03,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 132.1ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:11:03,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2041 states. [2021-06-05 14:11:03,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2041 to 1865. [2021-06-05 14:11:03,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1864 states have (on average 2.984978540772532) internal successors, (5564), 1864 states have internal predecessors, (5564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:03,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 5564 transitions. [2021-06-05 14:11:03,128 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 5564 transitions. Word has length 21 [2021-06-05 14:11:03,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:03,128 INFO L482 AbstractCegarLoop]: Abstraction has 1865 states and 5564 transitions. [2021-06-05 14:11:03,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:03,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 5564 transitions. [2021-06-05 14:11:03,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:03,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:03,130 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:03,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39633,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:03,345 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:03,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:03,345 INFO L82 PathProgramCache]: Analyzing trace with hash -437507650, now seen corresponding path program 327 times [2021-06-05 14:11:03,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:03,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115286471] [2021-06-05 14:11:03,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:03,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:03,407 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:03,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:03,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115286471] [2021-06-05 14:11:03,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115286471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:03,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504654554] [2021-06-05 14:11:03,407 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 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 14:11:03,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:11:03,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:03,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:03,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:03,481 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:03,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504654554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:03,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:03,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:11:03,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164258044] [2021-06-05 14:11:03,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:11:03,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:03,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:11:03,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:11:03,482 INFO L87 Difference]: Start difference. First operand 1865 states and 5564 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:03,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:03,618 INFO L93 Difference]: Finished difference Result 2235 states and 6339 transitions. [2021-06-05 14:11:03,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:11:03,618 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:03,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:03,621 INFO L225 Difference]: With dead ends: 2235 [2021-06-05 14:11:03,621 INFO L226 Difference]: Without dead ends: 2235 [2021-06-05 14:11:03,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 111.4ms TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:11:03,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2021-06-05 14:11:03,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 1818. [2021-06-05 14:11:03,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 2.977435332966428) internal successors, (5410), 1817 states have internal predecessors, (5410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:03,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 5410 transitions. [2021-06-05 14:11:03,647 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 5410 transitions. Word has length 21 [2021-06-05 14:11:03,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:03,647 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 5410 transitions. [2021-06-05 14:11:03,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:03,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 5410 transitions. [2021-06-05 14:11:03,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:03,649 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:03,649 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:03,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39634,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:03,866 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:03,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:03,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1172733119, now seen corresponding path program 328 times [2021-06-05 14:11:03,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:03,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743587490] [2021-06-05 14:11:03,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:03,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:03,958 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:03,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:03,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743587490] [2021-06-05 14:11:03,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743587490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:03,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392361347] [2021-06-05 14:11:03,959 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 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 14:11:03,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:11:03,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:03,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:03,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:04,047 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:04,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392361347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:04,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:04,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:11:04,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109096103] [2021-06-05 14:11:04,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:11:04,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:04,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:11:04,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:11:04,048 INFO L87 Difference]: Start difference. First operand 1818 states and 5410 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:04,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:04,207 INFO L93 Difference]: Finished difference Result 2108 states and 6025 transitions. [2021-06-05 14:11:04,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:11:04,208 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:04,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:04,210 INFO L225 Difference]: With dead ends: 2108 [2021-06-05 14:11:04,210 INFO L226 Difference]: Without dead ends: 2098 [2021-06-05 14:11:04,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 116.4ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:11:04,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2021-06-05 14:11:04,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1818. [2021-06-05 14:11:04,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 2.976884975233902) internal successors, (5409), 1817 states have internal predecessors, (5409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:04,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 5409 transitions. [2021-06-05 14:11:04,234 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 5409 transitions. Word has length 21 [2021-06-05 14:11:04,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:04,234 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 5409 transitions. [2021-06-05 14:11:04,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:04,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 5409 transitions. [2021-06-05 14:11:04,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:04,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:04,236 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:04,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39635 [2021-06-05 14:11:04,459 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:04,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:04,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1045627288, now seen corresponding path program 329 times [2021-06-05 14:11:04,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:04,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594942808] [2021-06-05 14:11:04,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:04,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:04,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:04,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594942808] [2021-06-05 14:11:04,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594942808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:04,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033028647] [2021-06-05 14:11:04,531 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 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 14:11:04,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:11:04,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:04,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:04,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:04,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033028647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:04,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:04,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:11:04,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293797472] [2021-06-05 14:11:04,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:11:04,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:04,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:11:04,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:11:04,640 INFO L87 Difference]: Start difference. First operand 1818 states and 5409 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:04,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:04,831 INFO L93 Difference]: Finished difference Result 3306 states and 9499 transitions. [2021-06-05 14:11:04,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:11:04,832 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:04,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:04,849 INFO L225 Difference]: With dead ends: 3306 [2021-06-05 14:11:04,849 INFO L226 Difference]: Without dead ends: 3306 [2021-06-05 14:11:04,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 158.1ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:11:04,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2021-06-05 14:11:04,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 1865. [2021-06-05 14:11:04,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1864 states have (on average 2.962982832618026) internal successors, (5523), 1864 states have internal predecessors, (5523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:04,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 5523 transitions. [2021-06-05 14:11:04,900 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 5523 transitions. Word has length 21 [2021-06-05 14:11:04,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:04,900 INFO L482 AbstractCegarLoop]: Abstraction has 1865 states and 5523 transitions. [2021-06-05 14:11:04,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:04,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 5523 transitions. [2021-06-05 14:11:04,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:04,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:04,902 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:05,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39636 [2021-06-05 14:11:05,121 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:05,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:05,121 INFO L82 PathProgramCache]: Analyzing trace with hash -558036613, now seen corresponding path program 330 times [2021-06-05 14:11:05,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:05,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381946819] [2021-06-05 14:11:05,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:05,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:05,198 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:05,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:05,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381946819] [2021-06-05 14:11:05,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381946819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:05,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491967036] [2021-06-05 14:11:05,198 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 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 14:11:05,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:11:05,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:05,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:05,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:05,266 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:05,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491967036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:05,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:05,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:11:05,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386002476] [2021-06-05 14:11:05,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:11:05,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:05,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:11:05,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:11:05,267 INFO L87 Difference]: Start difference. First operand 1865 states and 5523 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:05,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:05,409 INFO L93 Difference]: Finished difference Result 2163 states and 6155 transitions. [2021-06-05 14:11:05,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:11:05,410 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:05,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:05,415 INFO L225 Difference]: With dead ends: 2163 [2021-06-05 14:11:05,415 INFO L226 Difference]: Without dead ends: 2151 [2021-06-05 14:11:05,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 104.8ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:11:05,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2021-06-05 14:11:05,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 1867. [2021-06-05 14:11:05,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 2.9608788853161845) internal successors, (5525), 1866 states have internal predecessors, (5525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:05,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 5525 transitions. [2021-06-05 14:11:05,441 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 5525 transitions. Word has length 21 [2021-06-05 14:11:05,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:05,441 INFO L482 AbstractCegarLoop]: Abstraction has 1867 states and 5525 transitions. [2021-06-05 14:11:05,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:05,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 5525 transitions. [2021-06-05 14:11:05,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:05,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:05,443 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:05,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39637 [2021-06-05 14:11:05,643 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:05,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:05,644 INFO L82 PathProgramCache]: Analyzing trace with hash -221829890, now seen corresponding path program 331 times [2021-06-05 14:11:05,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:05,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85646893] [2021-06-05 14:11:05,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:05,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:05,715 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:05,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:05,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85646893] [2021-06-05 14:11:05,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85646893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:05,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659025053] [2021-06-05 14:11:05,716 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 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 14:11:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:05,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:05,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:05,793 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:05,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659025053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:05,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:05,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:11:05,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737379518] [2021-06-05 14:11:05,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:11:05,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:05,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:11:05,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:11:05,794 INFO L87 Difference]: Start difference. First operand 1867 states and 5525 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:06,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:06,078 INFO L93 Difference]: Finished difference Result 3350 states and 9497 transitions. [2021-06-05 14:11:06,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:11:06,079 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:06,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:06,083 INFO L225 Difference]: With dead ends: 3350 [2021-06-05 14:11:06,083 INFO L226 Difference]: Without dead ends: 3350 [2021-06-05 14:11:06,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 238.3ms TimeCoverageRelationStatistics Valid=336, Invalid=656, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:11:06,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3350 states. [2021-06-05 14:11:06,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3350 to 1964. [2021-06-05 14:11:06,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1963 states have (on average 2.957717778909832) internal successors, (5806), 1963 states have internal predecessors, (5806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:06,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 5806 transitions. [2021-06-05 14:11:06,124 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 5806 transitions. Word has length 21 [2021-06-05 14:11:06,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:06,124 INFO L482 AbstractCegarLoop]: Abstraction has 1964 states and 5806 transitions. [2021-06-05 14:11:06,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:06,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 5806 transitions. [2021-06-05 14:11:06,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:06,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:06,127 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:06,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39638 [2021-06-05 14:11:06,345 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:06,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:06,345 INFO L82 PathProgramCache]: Analyzing trace with hash 496894629, now seen corresponding path program 332 times [2021-06-05 14:11:06,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:06,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458577632] [2021-06-05 14:11:06,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:06,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:06,400 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:11:06,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:06,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458577632] [2021-06-05 14:11:06,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458577632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:06,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855085950] [2021-06-05 14:11:06,401 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 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 14:11:06,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:11:06,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:06,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:06,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:06,475 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:11:06,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855085950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:06,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:06,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:11:06,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593347424] [2021-06-05 14:11:06,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:11:06,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:06,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:11:06,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:11:06,476 INFO L87 Difference]: Start difference. First operand 1964 states and 5806 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:06,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:06,596 INFO L93 Difference]: Finished difference Result 2106 states and 6084 transitions. [2021-06-05 14:11:06,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:11:06,596 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 14:11:06,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:06,599 INFO L225 Difference]: With dead ends: 2106 [2021-06-05 14:11:06,599 INFO L226 Difference]: Without dead ends: 2106 [2021-06-05 14:11:06,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 86.0ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:11:06,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-06-05 14:11:06,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 1970. [2021-06-05 14:11:06,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1970 states, 1969 states have (on average 2.957846622651092) internal successors, (5824), 1969 states have internal predecessors, (5824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:06,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1970 states to 1970 states and 5824 transitions. [2021-06-05 14:11:06,627 INFO L78 Accepts]: Start accepts. Automaton has 1970 states and 5824 transitions. Word has length 21 [2021-06-05 14:11:06,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:06,627 INFO L482 AbstractCegarLoop]: Abstraction has 1970 states and 5824 transitions. [2021-06-05 14:11:06,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:06,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1970 states and 5824 transitions. [2021-06-05 14:11:06,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:06,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:06,630 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:06,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39639 [2021-06-05 14:11:06,830 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:06,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:06,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1283033832, now seen corresponding path program 333 times [2021-06-05 14:11:06,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:06,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925141608] [2021-06-05 14:11:06,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:06,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:06,888 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:11:06,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:06,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925141608] [2021-06-05 14:11:06,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925141608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:06,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940625846] [2021-06-05 14:11:06,889 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 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 14:11:06,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:11:06,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:06,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:06,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:06,964 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:11:06,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940625846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:06,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:06,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:11:06,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781735190] [2021-06-05 14:11:06,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:11:06,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:06,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:11:06,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:11:06,965 INFO L87 Difference]: Start difference. First operand 1970 states and 5824 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:07,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:07,189 INFO L93 Difference]: Finished difference Result 2190 states and 6175 transitions. [2021-06-05 14:11:07,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:11:07,190 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 14:11:07,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:07,192 INFO L225 Difference]: With dead ends: 2190 [2021-06-05 14:11:07,192 INFO L226 Difference]: Without dead ends: 2186 [2021-06-05 14:11:07,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 155.0ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:11:07,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2021-06-05 14:11:07,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 1970. [2021-06-05 14:11:07,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1970 states, 1969 states have (on average 2.95733875063484) internal successors, (5823), 1969 states have internal predecessors, (5823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:07,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1970 states to 1970 states and 5823 transitions. [2021-06-05 14:11:07,218 INFO L78 Accepts]: Start accepts. Automaton has 1970 states and 5823 transitions. Word has length 21 [2021-06-05 14:11:07,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:07,218 INFO L482 AbstractCegarLoop]: Abstraction has 1970 states and 5823 transitions. [2021-06-05 14:11:07,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:07,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1970 states and 5823 transitions. [2021-06-05 14:11:07,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:07,221 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:07,221 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:07,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39640,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:07,437 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:07,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:07,437 INFO L82 PathProgramCache]: Analyzing trace with hash 49909311, now seen corresponding path program 334 times [2021-06-05 14:11:07,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:07,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102196639] [2021-06-05 14:11:07,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:07,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:07,501 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:07,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:07,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102196639] [2021-06-05 14:11:07,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102196639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:07,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608683546] [2021-06-05 14:11:07,502 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 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 14:11:07,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:11:07,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:07,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:07,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:07,571 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:11:07,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608683546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:07,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:07,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:11:07,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548795541] [2021-06-05 14:11:07,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:11:07,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:07,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:11:07,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:11:07,573 INFO L87 Difference]: Start difference. First operand 1970 states and 5823 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:07,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:07,685 INFO L93 Difference]: Finished difference Result 2213 states and 6351 transitions. [2021-06-05 14:11:07,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:11:07,685 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 14:11:07,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:07,688 INFO L225 Difference]: With dead ends: 2213 [2021-06-05 14:11:07,688 INFO L226 Difference]: Without dead ends: 2193 [2021-06-05 14:11:07,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:11:07,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2193 states. [2021-06-05 14:11:07,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2193 to 1970. [2021-06-05 14:11:07,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1970 states, 1969 states have (on average 2.9563230066023363) internal successors, (5821), 1969 states have internal predecessors, (5821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:07,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1970 states to 1970 states and 5821 transitions. [2021-06-05 14:11:07,713 INFO L78 Accepts]: Start accepts. Automaton has 1970 states and 5821 transitions. Word has length 21 [2021-06-05 14:11:07,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:07,713 INFO L482 AbstractCegarLoop]: Abstraction has 1970 states and 5821 transitions. [2021-06-05 14:11:07,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:07,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1970 states and 5821 transitions. [2021-06-05 14:11:07,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:07,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:07,716 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:07,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39641,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:07,929 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:07,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:07,929 INFO L82 PathProgramCache]: Analyzing trace with hash -77196520, now seen corresponding path program 335 times [2021-06-05 14:11:07,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:07,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984698335] [2021-06-05 14:11:07,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:07,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:07,989 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:07,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:07,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984698335] [2021-06-05 14:11:07,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984698335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:07,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515334506] [2021-06-05 14:11:07,989 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 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 14:11:08,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:11:08,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:08,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:08,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:08,062 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:11:08,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515334506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:08,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:08,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:11:08,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625619484] [2021-06-05 14:11:08,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:11:08,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:08,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:11:08,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:11:08,063 INFO L87 Difference]: Start difference. First operand 1970 states and 5821 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:08,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:08,285 INFO L93 Difference]: Finished difference Result 2787 states and 7905 transitions. [2021-06-05 14:11:08,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:11:08,285 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 14:11:08,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:08,289 INFO L225 Difference]: With dead ends: 2787 [2021-06-05 14:11:08,289 INFO L226 Difference]: Without dead ends: 2787 [2021-06-05 14:11:08,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 165.4ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:11:08,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2021-06-05 14:11:08,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 2121. [2021-06-05 14:11:08,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2121 states, 2120 states have (on average 2.9627358490566036) internal successors, (6281), 2120 states have internal predecessors, (6281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:08,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2121 states to 2121 states and 6281 transitions. [2021-06-05 14:11:08,322 INFO L78 Accepts]: Start accepts. Automaton has 2121 states and 6281 transitions. Word has length 21 [2021-06-05 14:11:08,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:08,322 INFO L482 AbstractCegarLoop]: Abstraction has 2121 states and 6281 transitions. [2021-06-05 14:11:08,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:08,322 INFO L276 IsEmpty]: Start isEmpty. Operand 2121 states and 6281 transitions. [2021-06-05 14:11:08,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:08,324 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:08,324 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:08,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39642,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:08,544 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:08,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:08,545 INFO L82 PathProgramCache]: Analyzing trace with hash -586557543, now seen corresponding path program 336 times [2021-06-05 14:11:08,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:08,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465047700] [2021-06-05 14:11:08,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:08,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:08,628 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:08,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:08,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465047700] [2021-06-05 14:11:08,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465047700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:08,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636100118] [2021-06-05 14:11:08,628 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 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 14:11:08,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:11:08,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:08,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:08,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:08,701 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:08,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636100118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:08,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:08,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:11:08,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277365999] [2021-06-05 14:11:08,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:11:08,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:08,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:11:08,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:11:08,702 INFO L87 Difference]: Start difference. First operand 2121 states and 6281 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:08,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:08,854 INFO L93 Difference]: Finished difference Result 2439 states and 6992 transitions. [2021-06-05 14:11:08,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:11:08,855 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:08,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:08,857 INFO L225 Difference]: With dead ends: 2439 [2021-06-05 14:11:08,857 INFO L226 Difference]: Without dead ends: 2419 [2021-06-05 14:11:08,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 122.4ms TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:11:08,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2419 states. [2021-06-05 14:11:08,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2419 to 2121. [2021-06-05 14:11:08,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2121 states, 2120 states have (on average 2.9584905660377356) internal successors, (6272), 2120 states have internal predecessors, (6272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:08,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2121 states to 2121 states and 6272 transitions. [2021-06-05 14:11:08,888 INFO L78 Accepts]: Start accepts. Automaton has 2121 states and 6272 transitions. Word has length 21 [2021-06-05 14:11:08,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:08,888 INFO L482 AbstractCegarLoop]: Abstraction has 2121 states and 6272 transitions. [2021-06-05 14:11:08,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:08,889 INFO L276 IsEmpty]: Start isEmpty. Operand 2121 states and 6272 transitions. [2021-06-05 14:11:08,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:08,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:08,890 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:09,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39643 [2021-06-05 14:11:09,091 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:09,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:09,091 INFO L82 PathProgramCache]: Analyzing trace with hash -713663374, now seen corresponding path program 337 times [2021-06-05 14:11:09,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:09,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736379518] [2021-06-05 14:11:09,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:09,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:09,157 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:09,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:09,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736379518] [2021-06-05 14:11:09,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736379518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:09,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66859216] [2021-06-05 14:11:09,157 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 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 14:11:09,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:09,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:09,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:09,232 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:09,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66859216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:09,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:09,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:11:09,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293285257] [2021-06-05 14:11:09,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:11:09,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:09,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:11:09,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:11:09,233 INFO L87 Difference]: Start difference. First operand 2121 states and 6272 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:09,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:09,435 INFO L93 Difference]: Finished difference Result 2730 states and 7756 transitions. [2021-06-05 14:11:09,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:11:09,436 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:09,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:09,439 INFO L225 Difference]: With dead ends: 2730 [2021-06-05 14:11:09,439 INFO L226 Difference]: Without dead ends: 2730 [2021-06-05 14:11:09,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 164.9ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:11:09,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2730 states. [2021-06-05 14:11:09,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2730 to 1965. [2021-06-05 14:11:09,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1964 states have (on average 2.969959266802444) internal successors, (5833), 1964 states have internal predecessors, (5833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:09,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 5833 transitions. [2021-06-05 14:11:09,469 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 5833 transitions. Word has length 21 [2021-06-05 14:11:09,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:09,470 INFO L482 AbstractCegarLoop]: Abstraction has 1965 states and 5833 transitions. [2021-06-05 14:11:09,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:09,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 5833 transitions. [2021-06-05 14:11:09,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:09,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:09,472 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:09,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39644,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:09,685 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:09,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:09,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1977640021, now seen corresponding path program 338 times [2021-06-05 14:11:09,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:09,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563078390] [2021-06-05 14:11:09,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:09,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:09,758 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:09,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:09,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563078390] [2021-06-05 14:11:09,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563078390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:09,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333515168] [2021-06-05 14:11:09,759 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 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 14:11:09,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:11:09,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:09,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:09,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:09,853 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:09,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333515168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:09,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:09,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:11:09,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154715751] [2021-06-05 14:11:09,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:11:09,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:09,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:11:09,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:11:09,854 INFO L87 Difference]: Start difference. First operand 1965 states and 5833 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:09,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:09,978 INFO L93 Difference]: Finished difference Result 2345 states and 6666 transitions. [2021-06-05 14:11:09,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:11:09,978 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:09,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:09,981 INFO L225 Difference]: With dead ends: 2345 [2021-06-05 14:11:09,981 INFO L226 Difference]: Without dead ends: 2333 [2021-06-05 14:11:09,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:11:09,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2021-06-05 14:11:10,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1974. [2021-06-05 14:11:10,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 2.964521033958439) internal successors, (5849), 1973 states have internal predecessors, (5849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:10,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 5849 transitions. [2021-06-05 14:11:10,007 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 5849 transitions. Word has length 21 [2021-06-05 14:11:10,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:10,007 INFO L482 AbstractCegarLoop]: Abstraction has 1974 states and 5849 transitions. [2021-06-05 14:11:10,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:10,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 5849 transitions. [2021-06-05 14:11:10,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:10,009 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:10,009 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:10,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39645 [2021-06-05 14:11:10,210 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:10,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:10,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1981120552, now seen corresponding path program 339 times [2021-06-05 14:11:10,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:10,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662716885] [2021-06-05 14:11:10,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:10,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:10,284 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:10,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:10,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662716885] [2021-06-05 14:11:10,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662716885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:10,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954051315] [2021-06-05 14:11:10,284 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 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 14:11:10,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:11:10,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:10,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:10,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:10,358 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:10,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954051315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:10,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:10,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:11:10,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769206993] [2021-06-05 14:11:10,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:11:10,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:10,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:11:10,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:11:10,359 INFO L87 Difference]: Start difference. First operand 1974 states and 5849 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:10,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:10,643 INFO L93 Difference]: Finished difference Result 3098 states and 8778 transitions. [2021-06-05 14:11:10,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:11:10,643 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:10,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:10,647 INFO L225 Difference]: With dead ends: 3098 [2021-06-05 14:11:10,647 INFO L226 Difference]: Without dead ends: 3098 [2021-06-05 14:11:10,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 223.3ms TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:11:10,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3098 states. [2021-06-05 14:11:10,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3098 to 1904. [2021-06-05 14:11:10,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1904 states, 1903 states have (on average 2.9600630583289544) internal successors, (5633), 1903 states have internal predecessors, (5633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:10,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1904 states to 1904 states and 5633 transitions. [2021-06-05 14:11:10,678 INFO L78 Accepts]: Start accepts. Automaton has 1904 states and 5633 transitions. Word has length 21 [2021-06-05 14:11:10,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:10,678 INFO L482 AbstractCegarLoop]: Abstraction has 1904 states and 5633 transitions. [2021-06-05 14:11:10,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:10,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1904 states and 5633 transitions. [2021-06-05 14:11:10,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:10,680 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:10,680 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:10,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39646,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:10,901 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:10,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:10,901 INFO L82 PathProgramCache]: Analyzing trace with hash 643452475, now seen corresponding path program 340 times [2021-06-05 14:11:10,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:10,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100997230] [2021-06-05 14:11:10,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:10,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:10,947 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:11:10,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:10,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100997230] [2021-06-05 14:11:10,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100997230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:10,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051731635] [2021-06-05 14:11:10,947 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 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 14:11:10,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:11:10,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:10,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:10,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:11,020 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:11:11,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051731635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:11,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:11,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:11:11,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672561968] [2021-06-05 14:11:11,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:11:11,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:11,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:11:11,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:11:11,021 INFO L87 Difference]: Start difference. First operand 1904 states and 5633 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:11,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:11,100 INFO L93 Difference]: Finished difference Result 2228 states and 6256 transitions. [2021-06-05 14:11:11,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:11:11,100 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 14:11:11,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:11,102 INFO L225 Difference]: With dead ends: 2228 [2021-06-05 14:11:11,102 INFO L226 Difference]: Without dead ends: 2228 [2021-06-05 14:11:11,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:11:11,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-06-05 14:11:11,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 1928. [2021-06-05 14:11:11,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 2.9709392838609237) internal successors, (5725), 1927 states have internal predecessors, (5725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:11,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 5725 transitions. [2021-06-05 14:11:11,129 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 5725 transitions. Word has length 21 [2021-06-05 14:11:11,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:11,130 INFO L482 AbstractCegarLoop]: Abstraction has 1928 states and 5725 transitions. [2021-06-05 14:11:11,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:11,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 5725 transitions. [2021-06-05 14:11:11,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:11,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:11,132 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:11,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39647 [2021-06-05 14:11:11,355 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:11,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:11,355 INFO L82 PathProgramCache]: Analyzing trace with hash 724582760, now seen corresponding path program 341 times [2021-06-05 14:11:11,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:11,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805418664] [2021-06-05 14:11:11,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:11,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:11:11,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:11,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805418664] [2021-06-05 14:11:11,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805418664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:11,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054016412] [2021-06-05 14:11:11,430 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 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 14:11:11,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:11:11,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:11,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:11,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:11,502 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:11:11,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054016412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:11,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:11,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 14:11:11,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068373779] [2021-06-05 14:11:11,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:11:11,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:11,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:11:11,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:11:11,503 INFO L87 Difference]: Start difference. First operand 1928 states and 5725 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:11,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:11,639 INFO L93 Difference]: Finished difference Result 2105 states and 6019 transitions. [2021-06-05 14:11:11,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:11:11,639 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 14:11:11,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:11,641 INFO L225 Difference]: With dead ends: 2105 [2021-06-05 14:11:11,641 INFO L226 Difference]: Without dead ends: 2103 [2021-06-05 14:11:11,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 102.8ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:11:11,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2103 states. [2021-06-05 14:11:11,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2103 to 1939. [2021-06-05 14:11:11,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 2.9726522187822497) internal successors, (5761), 1938 states have internal predecessors, (5761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:11,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 5761 transitions. [2021-06-05 14:11:11,663 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 5761 transitions. Word has length 21 [2021-06-05 14:11:11,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:11,663 INFO L482 AbstractCegarLoop]: Abstraction has 1939 states and 5761 transitions. [2021-06-05 14:11:11,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:11,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 5761 transitions. [2021-06-05 14:11:11,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:11,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:11,664 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:11,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39648 [2021-06-05 14:11:11,865 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:11,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:11,866 INFO L82 PathProgramCache]: Analyzing trace with hash -587477573, now seen corresponding path program 342 times [2021-06-05 14:11:11,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:11,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819424979] [2021-06-05 14:11:11,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:11,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:11,937 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:11:11,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:11,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819424979] [2021-06-05 14:11:11,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819424979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:11,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708829937] [2021-06-05 14:11:11,937 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 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 14:11:11,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:11:11,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:11,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:11,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:12,014 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:11:12,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708829937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:12,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:12,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:11:12,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019258208] [2021-06-05 14:11:12,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:11:12,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:12,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:11:12,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:11:12,015 INFO L87 Difference]: Start difference. First operand 1939 states and 5761 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:12,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:12,214 INFO L93 Difference]: Finished difference Result 2242 states and 6291 transitions. [2021-06-05 14:11:12,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:11:12,214 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:12,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:12,217 INFO L225 Difference]: With dead ends: 2242 [2021-06-05 14:11:12,217 INFO L226 Difference]: Without dead ends: 2212 [2021-06-05 14:11:12,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 142.1ms TimeCoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:11:12,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-06-05 14:11:12,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 1939. [2021-06-05 14:11:12,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 2.9623323013415894) internal successors, (5741), 1938 states have internal predecessors, (5741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:12,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 5741 transitions. [2021-06-05 14:11:12,253 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 5741 transitions. Word has length 21 [2021-06-05 14:11:12,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:12,253 INFO L482 AbstractCegarLoop]: Abstraction has 1939 states and 5741 transitions. [2021-06-05 14:11:12,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:12,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 5741 transitions. [2021-06-05 14:11:12,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:12,256 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:12,256 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:12,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39649 [2021-06-05 14:11:12,469 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:12,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:12,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1157806463, now seen corresponding path program 343 times [2021-06-05 14:11:12,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:12,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266046213] [2021-06-05 14:11:12,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:12,566 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:12,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:12,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266046213] [2021-06-05 14:11:12,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266046213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:12,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378888100] [2021-06-05 14:11:12,566 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 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 14:11:12,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:12,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:12,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:12,712 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:12,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378888100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:12,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:12,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:11:12,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986254995] [2021-06-05 14:11:12,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:11:12,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:12,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:11:12,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:11:12,713 INFO L87 Difference]: Start difference. First operand 1939 states and 5741 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:12,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:12,951 INFO L93 Difference]: Finished difference Result 2170 states and 6162 transitions. [2021-06-05 14:11:12,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:11:12,951 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:12,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:12,954 INFO L225 Difference]: With dead ends: 2170 [2021-06-05 14:11:12,954 INFO L226 Difference]: Without dead ends: 2150 [2021-06-05 14:11:12,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 222.7ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:11:12,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-06-05 14:11:12,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 1941. [2021-06-05 14:11:12,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1940 states have (on average 2.956701030927835) internal successors, (5736), 1940 states have internal predecessors, (5736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:12,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 5736 transitions. [2021-06-05 14:11:12,974 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 5736 transitions. Word has length 21 [2021-06-05 14:11:12,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:12,975 INFO L482 AbstractCegarLoop]: Abstraction has 1941 states and 5736 transitions. [2021-06-05 14:11:12,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:12,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 5736 transitions. [2021-06-05 14:11:12,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:12,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:12,976 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:13,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39650,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:13,182 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:13,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:13,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1030700632, now seen corresponding path program 344 times [2021-06-05 14:11:13,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:13,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324952747] [2021-06-05 14:11:13,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:13,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:13,248 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:13,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:13,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324952747] [2021-06-05 14:11:13,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324952747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:13,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951246845] [2021-06-05 14:11:13,248 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 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 14:11:13,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:11:13,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:13,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:13,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:13,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951246845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:13,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:13,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:11:13,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743527190] [2021-06-05 14:11:13,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:11:13,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:13,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:11:13,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:11:13,329 INFO L87 Difference]: Start difference. First operand 1941 states and 5736 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:13,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:13,497 INFO L93 Difference]: Finished difference Result 2262 states and 6373 transitions. [2021-06-05 14:11:13,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:11:13,498 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:13,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:13,501 INFO L225 Difference]: With dead ends: 2262 [2021-06-05 14:11:13,501 INFO L226 Difference]: Without dead ends: 2262 [2021-06-05 14:11:13,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 143.2ms TimeCoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:11:13,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-06-05 14:11:13,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1442. [2021-06-05 14:11:13,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 2.8986814712005553) internal successors, (4177), 1441 states have internal predecessors, (4177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:13,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4177 transitions. [2021-06-05 14:11:13,524 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4177 transitions. Word has length 21 [2021-06-05 14:11:13,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:13,524 INFO L482 AbstractCegarLoop]: Abstraction has 1442 states and 4177 transitions. [2021-06-05 14:11:13,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:13,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4177 transitions. [2021-06-05 14:11:13,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:13,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:13,526 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:13,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39651,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:13,750 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:13,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:13,750 INFO L82 PathProgramCache]: Analyzing trace with hash -572963269, now seen corresponding path program 345 times [2021-06-05 14:11:13,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:13,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980741444] [2021-06-05 14:11:13,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:13,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:13,827 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:13,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:13,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980741444] [2021-06-05 14:11:13,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980741444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:13,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644478506] [2021-06-05 14:11:13,828 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 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 14:11:13,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:11:13,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:13,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:13,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:13,912 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:13,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644478506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:13,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:13,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:11:13,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943021087] [2021-06-05 14:11:13,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:11:13,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:13,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:11:13,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:11:13,913 INFO L87 Difference]: Start difference. First operand 1442 states and 4177 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:14,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:14,041 INFO L93 Difference]: Finished difference Result 1911 states and 5213 transitions. [2021-06-05 14:11:14,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:11:14,041 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:14,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:14,043 INFO L225 Difference]: With dead ends: 1911 [2021-06-05 14:11:14,043 INFO L226 Difference]: Without dead ends: 1899 [2021-06-05 14:11:14,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 119.0ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:11:14,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2021-06-05 14:11:14,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1444. [2021-06-05 14:11:14,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 2.898128898128898) internal successors, (4182), 1443 states have internal predecessors, (4182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:14,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 4182 transitions. [2021-06-05 14:11:14,062 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 4182 transitions. Word has length 21 [2021-06-05 14:11:14,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:14,062 INFO L482 AbstractCegarLoop]: Abstraction has 1444 states and 4182 transitions. [2021-06-05 14:11:14,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:14,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 4182 transitions. [2021-06-05 14:11:14,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:14,064 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:14,064 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:14,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39652,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:14,285 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:14,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:14,285 INFO L82 PathProgramCache]: Analyzing trace with hash -236756546, now seen corresponding path program 346 times [2021-06-05 14:11:14,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:14,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268592149] [2021-06-05 14:11:14,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:14,354 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:14,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:14,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268592149] [2021-06-05 14:11:14,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268592149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:14,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147197143] [2021-06-05 14:11:14,354 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 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 14:11:14,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:11:14,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:14,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:14,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:14,439 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:14,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147197143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:14,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:14,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:11:14,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742248315] [2021-06-05 14:11:14,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:11:14,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:14,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:11:14,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:11:14,440 INFO L87 Difference]: Start difference. First operand 1444 states and 4182 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:14,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:14,670 INFO L93 Difference]: Finished difference Result 2375 states and 6555 transitions. [2021-06-05 14:11:14,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:11:14,670 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:14,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:14,673 INFO L225 Difference]: With dead ends: 2375 [2021-06-05 14:11:14,673 INFO L226 Difference]: Without dead ends: 2375 [2021-06-05 14:11:14,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 199.3ms TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:11:14,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2375 states. [2021-06-05 14:11:14,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2375 to 1721. [2021-06-05 14:11:14,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1721 states, 1720 states have (on average 2.9209302325581397) internal successors, (5024), 1720 states have internal predecessors, (5024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:14,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 5024 transitions. [2021-06-05 14:11:14,696 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 5024 transitions. Word has length 21 [2021-06-05 14:11:14,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:14,696 INFO L482 AbstractCegarLoop]: Abstraction has 1721 states and 5024 transitions. [2021-06-05 14:11:14,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:14,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 5024 transitions. [2021-06-05 14:11:14,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:14,698 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:14,698 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:14,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39653,355 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:14,921 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:14,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:14,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1607749887, now seen corresponding path program 347 times [2021-06-05 14:11:14,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:14,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345998195] [2021-06-05 14:11:14,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:14,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:14,999 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:14,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:14,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345998195] [2021-06-05 14:11:14,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345998195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:14,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336974890] [2021-06-05 14:11:14,999 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 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 14:11:15,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:11:15,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:15,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:15,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:15,078 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:15,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336974890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:15,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:15,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:11:15,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038935345] [2021-06-05 14:11:15,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:11:15,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:15,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:11:15,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:11:15,079 INFO L87 Difference]: Start difference. First operand 1721 states and 5024 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:15,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:15,229 INFO L93 Difference]: Finished difference Result 2189 states and 6061 transitions. [2021-06-05 14:11:15,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:11:15,230 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:15,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:15,232 INFO L225 Difference]: With dead ends: 2189 [2021-06-05 14:11:15,232 INFO L226 Difference]: Without dead ends: 2175 [2021-06-05 14:11:15,232 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 113.5ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:11:15,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2021-06-05 14:11:15,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 1736. [2021-06-05 14:11:15,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1736 states, 1735 states have (on average 2.9129682997118156) internal successors, (5054), 1735 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:15,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 5054 transitions. [2021-06-05 14:11:15,254 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 5054 transitions. Word has length 21 [2021-06-05 14:11:15,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:15,254 INFO L482 AbstractCegarLoop]: Abstraction has 1736 states and 5054 transitions. [2021-06-05 14:11:15,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:15,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 5054 transitions. [2021-06-05 14:11:15,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:15,256 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:15,256 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:15,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39654,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:15,475 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:15,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:15,476 INFO L82 PathProgramCache]: Analyzing trace with hash -873223400, now seen corresponding path program 348 times [2021-06-05 14:11:15,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:15,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360744944] [2021-06-05 14:11:15,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:15,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:15,549 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:15,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:15,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360744944] [2021-06-05 14:11:15,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360744944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:15,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684741710] [2021-06-05 14:11:15,550 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 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 14:11:15,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:11:15,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:15,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:15,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:15,633 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:15,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684741710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:15,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:15,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:11:15,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037742293] [2021-06-05 14:11:15,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:11:15,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:15,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:11:15,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:11:15,634 INFO L87 Difference]: Start difference. First operand 1736 states and 5054 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:15,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:15,948 INFO L93 Difference]: Finished difference Result 2910 states and 8090 transitions. [2021-06-05 14:11:15,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:11:15,948 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:15,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:15,951 INFO L225 Difference]: With dead ends: 2910 [2021-06-05 14:11:15,951 INFO L226 Difference]: Without dead ends: 2910 [2021-06-05 14:11:15,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 268.9ms TimeCoverageRelationStatistics Valid=445, Invalid=887, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:11:15,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2021-06-05 14:11:15,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2068. [2021-06-05 14:11:15,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2068 states, 2067 states have (on average 2.9225931301403) internal successors, (6041), 2067 states have internal predecessors, (6041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:15,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2068 states to 2068 states and 6041 transitions. [2021-06-05 14:11:15,981 INFO L78 Accepts]: Start accepts. Automaton has 2068 states and 6041 transitions. Word has length 21 [2021-06-05 14:11:15,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:15,981 INFO L482 AbstractCegarLoop]: Abstraction has 2068 states and 6041 transitions. [2021-06-05 14:11:15,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:15,981 INFO L276 IsEmpty]: Start isEmpty. Operand 2068 states and 6041 transitions. [2021-06-05 14:11:15,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:15,983 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:15,983 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:16,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39655,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:16,205 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:16,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:16,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1793458955, now seen corresponding path program 349 times [2021-06-05 14:11:16,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:16,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643932234] [2021-06-05 14:11:16,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:16,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:16,266 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:16,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:16,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643932234] [2021-06-05 14:11:16,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643932234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:16,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459208394] [2021-06-05 14:11:16,266 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 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 14:11:16,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:16,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:16,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:16,339 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:11:16,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459208394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:16,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:16,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:11:16,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477079835] [2021-06-05 14:11:16,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:11:16,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:16,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:11:16,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:11:16,340 INFO L87 Difference]: Start difference. First operand 2068 states and 6041 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:16,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:16,450 INFO L93 Difference]: Finished difference Result 2357 states and 6621 transitions. [2021-06-05 14:11:16,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:11:16,451 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 14:11:16,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:16,453 INFO L225 Difference]: With dead ends: 2357 [2021-06-05 14:11:16,453 INFO L226 Difference]: Without dead ends: 2357 [2021-06-05 14:11:16,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:11:16,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2021-06-05 14:11:16,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2117. [2021-06-05 14:11:16,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2117 states, 2116 states have (on average 2.9343100189035916) internal successors, (6209), 2116 states have internal predecessors, (6209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:16,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 6209 transitions. [2021-06-05 14:11:16,480 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 6209 transitions. Word has length 21 [2021-06-05 14:11:16,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:16,481 INFO L482 AbstractCegarLoop]: Abstraction has 2117 states and 6209 transitions. [2021-06-05 14:11:16,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:16,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 6209 transitions. [2021-06-05 14:11:16,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:16,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:16,483 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:16,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39656 [2021-06-05 14:11:16,705 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:16,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:16,705 INFO L82 PathProgramCache]: Analyzing trace with hash 13530494, now seen corresponding path program 350 times [2021-06-05 14:11:16,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:16,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754964677] [2021-06-05 14:11:16,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:16,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:16,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754964677] [2021-06-05 14:11:16,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754964677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:16,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060164764] [2021-06-05 14:11:16,765 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 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 14:11:16,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:11:16,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:16,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:16,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:16,868 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:11:16,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060164764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:16,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:16,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:11:16,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563393311] [2021-06-05 14:11:16,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:11:16,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:16,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:11:16,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:11:16,869 INFO L87 Difference]: Start difference. First operand 2117 states and 6209 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:17,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:17,084 INFO L93 Difference]: Finished difference Result 2396 states and 6695 transitions. [2021-06-05 14:11:17,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:11:17,084 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 14:11:17,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:17,088 INFO L225 Difference]: With dead ends: 2396 [2021-06-05 14:11:17,088 INFO L226 Difference]: Without dead ends: 2392 [2021-06-05 14:11:17,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 141.5ms TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:11:17,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2392 states. [2021-06-05 14:11:17,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 2136. [2021-06-05 14:11:17,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2135 states have (on average 2.9400468384074943) internal successors, (6277), 2135 states have internal predecessors, (6277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:17,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 6277 transitions. [2021-06-05 14:11:17,122 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 6277 transitions. Word has length 21 [2021-06-05 14:11:17,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:17,122 INFO L482 AbstractCegarLoop]: Abstraction has 2136 states and 6277 transitions. [2021-06-05 14:11:17,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:17,122 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 6277 transitions. [2021-06-05 14:11:17,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:17,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:17,124 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:17,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39657 [2021-06-05 14:11:17,348 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:17,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:17,348 INFO L82 PathProgramCache]: Analyzing trace with hash -2115307227, now seen corresponding path program 351 times [2021-06-05 14:11:17,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:17,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473054441] [2021-06-05 14:11:17,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:17,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:17,401 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:17,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:17,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473054441] [2021-06-05 14:11:17,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473054441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:17,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925294884] [2021-06-05 14:11:17,402 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 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 14:11:17,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:11:17,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:17,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:17,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:17,472 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:11:17,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925294884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:17,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:17,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:11:17,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271984124] [2021-06-05 14:11:17,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:11:17,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:17,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:11:17,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:11:17,473 INFO L87 Difference]: Start difference. First operand 2136 states and 6277 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:17,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:17,587 INFO L93 Difference]: Finished difference Result 2333 states and 6617 transitions. [2021-06-05 14:11:17,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:11:17,587 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 14:11:17,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:17,589 INFO L225 Difference]: With dead ends: 2333 [2021-06-05 14:11:17,589 INFO L226 Difference]: Without dead ends: 2331 [2021-06-05 14:11:17,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 87.1ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:11:17,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-06-05 14:11:17,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 2136. [2021-06-05 14:11:17,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2135 states have (on average 2.9395784543325525) internal successors, (6276), 2135 states have internal predecessors, (6276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:17,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 6276 transitions. [2021-06-05 14:11:17,613 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 6276 transitions. Word has length 21 [2021-06-05 14:11:17,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:17,613 INFO L482 AbstractCegarLoop]: Abstraction has 2136 states and 6276 transitions. [2021-06-05 14:11:17,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:17,613 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 6276 transitions. [2021-06-05 14:11:17,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:17,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:17,616 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:17,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39658,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:17,839 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:17,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:17,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1518396286, now seen corresponding path program 352 times [2021-06-05 14:11:17,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:17,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911908391] [2021-06-05 14:11:17,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:17,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:17,896 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:17,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:17,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911908391] [2021-06-05 14:11:17,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911908391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:17,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403909499] [2021-06-05 14:11:17,896 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 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 14:11:17,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:11:17,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:17,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:17,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:11:17,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403909499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:17,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:17,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:11:17,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148215715] [2021-06-05 14:11:17,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:11:17,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:17,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:11:17,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:11:17,973 INFO L87 Difference]: Start difference. First operand 2136 states and 6276 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:18,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:18,062 INFO L93 Difference]: Finished difference Result 2457 states and 6862 transitions. [2021-06-05 14:11:18,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:11:18,062 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 14:11:18,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:18,065 INFO L225 Difference]: With dead ends: 2457 [2021-06-05 14:11:18,065 INFO L226 Difference]: Without dead ends: 2457 [2021-06-05 14:11:18,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:11:18,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-06-05 14:11:18,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2126. [2021-06-05 14:11:18,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 2.9345882352941177) internal successors, (6236), 2125 states have internal predecessors, (6236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:18,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 6236 transitions. [2021-06-05 14:11:18,110 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 6236 transitions. Word has length 21 [2021-06-05 14:11:18,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:18,110 INFO L482 AbstractCegarLoop]: Abstraction has 2126 states and 6236 transitions. [2021-06-05 14:11:18,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:18,110 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 6236 transitions. [2021-06-05 14:11:18,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:18,112 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:18,112 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:18,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39659 [2021-06-05 14:11:18,323 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:18,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:18,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1020762949, now seen corresponding path program 353 times [2021-06-05 14:11:18,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:18,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103141886] [2021-06-05 14:11:18,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:18,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:18,398 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:18,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:18,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103141886] [2021-06-05 14:11:18,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103141886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:18,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065695320] [2021-06-05 14:11:18,398 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 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 14:11:18,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:11:18,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:18,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:18,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:18,467 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:18,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065695320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:18,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:18,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:11:18,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144117210] [2021-06-05 14:11:18,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:11:18,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:18,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:11:18,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:11:18,468 INFO L87 Difference]: Start difference. First operand 2126 states and 6236 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:18,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:18,608 INFO L93 Difference]: Finished difference Result 2437 states and 6925 transitions. [2021-06-05 14:11:18,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:11:18,608 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:18,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:18,611 INFO L225 Difference]: With dead ends: 2437 [2021-06-05 14:11:18,611 INFO L226 Difference]: Without dead ends: 2425 [2021-06-05 14:11:18,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 109.6ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:11:18,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2021-06-05 14:11:18,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 2126. [2021-06-05 14:11:18,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 2.9336470588235293) internal successors, (6234), 2125 states have internal predecessors, (6234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:18,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 6234 transitions. [2021-06-05 14:11:18,640 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 6234 transitions. Word has length 21 [2021-06-05 14:11:18,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:18,640 INFO L482 AbstractCegarLoop]: Abstraction has 2126 states and 6234 transitions. [2021-06-05 14:11:18,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:18,640 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 6234 transitions. [2021-06-05 14:11:18,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:18,642 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:18,642 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:18,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39660,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:18,843 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:18,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:18,843 INFO L82 PathProgramCache]: Analyzing trace with hash -684556226, now seen corresponding path program 354 times [2021-06-05 14:11:18,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:18,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131525328] [2021-06-05 14:11:18,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:18,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:18,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:18,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131525328] [2021-06-05 14:11:18,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131525328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:18,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177896835] [2021-06-05 14:11:18,917 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 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 14:11:18,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:11:18,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:18,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:18,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:18,989 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:18,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177896835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:18,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:18,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:11:18,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369993062] [2021-06-05 14:11:18,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:11:18,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:18,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:11:18,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:11:18,990 INFO L87 Difference]: Start difference. First operand 2126 states and 6234 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:19,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:19,240 INFO L93 Difference]: Finished difference Result 2763 states and 7759 transitions. [2021-06-05 14:11:19,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:11:19,241 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:19,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:19,244 INFO L225 Difference]: With dead ends: 2763 [2021-06-05 14:11:19,244 INFO L226 Difference]: Without dead ends: 2763 [2021-06-05 14:11:19,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 214.4ms TimeCoverageRelationStatistics Valid=316, Invalid=614, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:11:19,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2763 states. [2021-06-05 14:11:19,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2763 to 2240. [2021-06-05 14:11:19,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.9383653416703885) internal successors, (6579), 2239 states have internal predecessors, (6579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:19,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 6579 transitions. [2021-06-05 14:11:19,275 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 6579 transitions. Word has length 21 [2021-06-05 14:11:19,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:19,275 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 6579 transitions. [2021-06-05 14:11:19,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:19,275 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 6579 transitions. [2021-06-05 14:11:19,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:19,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:19,278 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:19,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39661,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:19,478 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:19,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:19,479 INFO L82 PathProgramCache]: Analyzing trace with hash 723601057, now seen corresponding path program 355 times [2021-06-05 14:11:19,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:19,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112464963] [2021-06-05 14:11:19,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:19,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:19,581 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:19,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:19,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112464963] [2021-06-05 14:11:19,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112464963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:19,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148017786] [2021-06-05 14:11:19,581 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 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 14:11:19,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:19,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:19,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:19,664 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:19,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148017786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:19,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:19,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:11:19,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150739629] [2021-06-05 14:11:19,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:11:19,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:19,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:11:19,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:11:19,665 INFO L87 Difference]: Start difference. First operand 2240 states and 6579 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:19,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:19,852 INFO L93 Difference]: Finished difference Result 2620 states and 7456 transitions. [2021-06-05 14:11:19,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:11:19,852 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:19,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:19,855 INFO L225 Difference]: With dead ends: 2620 [2021-06-05 14:11:19,855 INFO L226 Difference]: Without dead ends: 2608 [2021-06-05 14:11:19,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 172.5ms TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:11:19,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-06-05 14:11:19,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 2240. [2021-06-05 14:11:19,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.935685573916927) internal successors, (6573), 2239 states have internal predecessors, (6573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:19,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 6573 transitions. [2021-06-05 14:11:19,885 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 6573 transitions. Word has length 21 [2021-06-05 14:11:19,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:19,886 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 6573 transitions. [2021-06-05 14:11:19,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:19,886 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 6573 transitions. [2021-06-05 14:11:19,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:19,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:19,888 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:20,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39662 [2021-06-05 14:11:20,110 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:20,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:20,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1059807780, now seen corresponding path program 356 times [2021-06-05 14:11:20,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:20,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001271958] [2021-06-05 14:11:20,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:20,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:20,178 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:20,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:20,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001271958] [2021-06-05 14:11:20,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001271958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:20,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289828954] [2021-06-05 14:11:20,178 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 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 14:11:20,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:11:20,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:20,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:20,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:20,259 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:20,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289828954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:20,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:20,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:11:20,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802134725] [2021-06-05 14:11:20,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:11:20,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:20,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:11:20,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:11:20,260 INFO L87 Difference]: Start difference. First operand 2240 states and 6573 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:20,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:20,492 INFO L93 Difference]: Finished difference Result 2711 states and 7663 transitions. [2021-06-05 14:11:20,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:11:20,492 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:20,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:20,496 INFO L225 Difference]: With dead ends: 2711 [2021-06-05 14:11:20,496 INFO L226 Difference]: Without dead ends: 2711 [2021-06-05 14:11:20,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 193.3ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:11:20,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2711 states. [2021-06-05 14:11:20,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2711 to 1587. [2021-06-05 14:11:20,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 2.91109709962169) internal successors, (4617), 1586 states have internal predecessors, (4617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:20,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 4617 transitions. [2021-06-05 14:11:20,528 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 4617 transitions. Word has length 21 [2021-06-05 14:11:20,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:20,528 INFO L482 AbstractCegarLoop]: Abstraction has 1587 states and 4617 transitions. [2021-06-05 14:11:20,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:20,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 4617 transitions. [2021-06-05 14:11:20,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:20,530 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:20,530 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:20,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39663,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:20,748 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:20,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:20,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1390653083, now seen corresponding path program 357 times [2021-06-05 14:11:20,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:20,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869744188] [2021-06-05 14:11:20,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:20,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:20,825 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:20,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:20,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869744188] [2021-06-05 14:11:20,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869744188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:20,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224446313] [2021-06-05 14:11:20,826 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 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 14:11:20,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:11:20,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:20,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:20,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:20,908 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:20,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224446313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:20,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:20,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:11:20,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946667277] [2021-06-05 14:11:20,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:11:20,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:20,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:11:20,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:11:20,909 INFO L87 Difference]: Start difference. First operand 1587 states and 4617 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:21,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:21,030 INFO L93 Difference]: Finished difference Result 2083 states and 5732 transitions. [2021-06-05 14:11:21,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:11:21,030 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:21,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:21,033 INFO L225 Difference]: With dead ends: 2083 [2021-06-05 14:11:21,033 INFO L226 Difference]: Without dead ends: 2069 [2021-06-05 14:11:21,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 117.3ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:11:21,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2021-06-05 14:11:21,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 1608. [2021-06-05 14:11:21,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 2.8985687616677036) internal successors, (4658), 1607 states have internal predecessors, (4658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:21,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 4658 transitions. [2021-06-05 14:11:21,056 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 4658 transitions. Word has length 21 [2021-06-05 14:11:21,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:21,056 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 4658 transitions. [2021-06-05 14:11:21,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:21,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 4658 transitions. [2021-06-05 14:11:21,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:21,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:21,058 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:21,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39664,366 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:21,282 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:21,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:21,282 INFO L82 PathProgramCache]: Analyzing trace with hash 423340926, now seen corresponding path program 358 times [2021-06-05 14:11:21,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:21,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284516464] [2021-06-05 14:11:21,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:21,355 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:21,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:21,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284516464] [2021-06-05 14:11:21,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284516464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:21,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164712104] [2021-06-05 14:11:21,356 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 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 14:11:21,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:11:21,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:21,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:21,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:21,438 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:21,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164712104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:21,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:21,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:11:21,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461541374] [2021-06-05 14:11:21,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:11:21,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:21,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:11:21,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:11:21,439 INFO L87 Difference]: Start difference. First operand 1608 states and 4658 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:21,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:21,768 INFO L93 Difference]: Finished difference Result 2373 states and 6517 transitions. [2021-06-05 14:11:21,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:11:21,768 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:21,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:21,771 INFO L225 Difference]: With dead ends: 2373 [2021-06-05 14:11:21,771 INFO L226 Difference]: Without dead ends: 2373 [2021-06-05 14:11:21,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 267.5ms TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:11:21,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2021-06-05 14:11:21,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 1546. [2021-06-05 14:11:21,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 1545 states have (on average 2.8944983818770225) internal successors, (4472), 1545 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:21,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 4472 transitions. [2021-06-05 14:11:21,795 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 4472 transitions. Word has length 21 [2021-06-05 14:11:21,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:21,795 INFO L482 AbstractCegarLoop]: Abstraction has 1546 states and 4472 transitions. [2021-06-05 14:11:21,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:21,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 4472 transitions. [2021-06-05 14:11:21,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:21,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:21,796 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:22,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39665,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:22,017 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:22,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:22,017 INFO L82 PathProgramCache]: Analyzing trace with hash 180726139, now seen corresponding path program 359 times [2021-06-05 14:11:22,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:22,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773142941] [2021-06-05 14:11:22,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:22,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:22,070 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:22,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:22,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773142941] [2021-06-05 14:11:22,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773142941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:22,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701865525] [2021-06-05 14:11:22,071 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 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 14:11:22,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:11:22,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:22,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:22,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:22,147 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:11:22,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701865525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:22,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:22,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:11:22,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537045225] [2021-06-05 14:11:22,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:11:22,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:22,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:11:22,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:11:22,148 INFO L87 Difference]: Start difference. First operand 1546 states and 4472 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:22,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:22,225 INFO L93 Difference]: Finished difference Result 2113 states and 5765 transitions. [2021-06-05 14:11:22,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:11:22,226 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 14:11:22,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:22,228 INFO L225 Difference]: With dead ends: 2113 [2021-06-05 14:11:22,228 INFO L226 Difference]: Without dead ends: 2113 [2021-06-05 14:11:22,228 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:11:22,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2021-06-05 14:11:22,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 1736. [2021-06-05 14:11:22,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1736 states, 1735 states have (on average 2.936023054755043) internal successors, (5094), 1735 states have internal predecessors, (5094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:22,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 5094 transitions. [2021-06-05 14:11:22,250 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 5094 transitions. Word has length 21 [2021-06-05 14:11:22,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:22,250 INFO L482 AbstractCegarLoop]: Abstraction has 1736 states and 5094 transitions. [2021-06-05 14:11:22,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:22,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 5094 transitions. [2021-06-05 14:11:22,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:22,252 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:22,252 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:22,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39666,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:22,452 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:22,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:22,453 INFO L82 PathProgramCache]: Analyzing trace with hash 261856424, now seen corresponding path program 360 times [2021-06-05 14:11:22,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:22,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984142893] [2021-06-05 14:11:22,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:22,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:22,502 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:22,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:22,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984142893] [2021-06-05 14:11:22,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984142893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:22,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621696871] [2021-06-05 14:11:22,503 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 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 14:11:22,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:11:22,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:22,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:22,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:22,572 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:11:22,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621696871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:22,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:22,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:11:22,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683845503] [2021-06-05 14:11:22,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:11:22,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:22,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:11:22,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:11:22,573 INFO L87 Difference]: Start difference. First operand 1736 states and 5094 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:22,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:22,736 INFO L93 Difference]: Finished difference Result 1970 states and 5495 transitions. [2021-06-05 14:11:22,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:11:22,736 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 14:11:22,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:22,738 INFO L225 Difference]: With dead ends: 1970 [2021-06-05 14:11:22,739 INFO L226 Difference]: Without dead ends: 1968 [2021-06-05 14:11:22,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 97.0ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:11:22,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2021-06-05 14:11:22,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1755. [2021-06-05 14:11:22,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1755 states, 1754 states have (on average 2.944127708095781) internal successors, (5164), 1754 states have internal predecessors, (5164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:22,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 5164 transitions. [2021-06-05 14:11:22,761 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 5164 transitions. Word has length 21 [2021-06-05 14:11:22,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:22,761 INFO L482 AbstractCegarLoop]: Abstraction has 1755 states and 5164 transitions. [2021-06-05 14:11:22,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:22,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 5164 transitions. [2021-06-05 14:11:22,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:22,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:22,763 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:22,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39667,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:22,987 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:22,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:22,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1775453631, now seen corresponding path program 361 times [2021-06-05 14:11:22,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:22,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490345901] [2021-06-05 14:11:22,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:22,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:23,039 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:23,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:23,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490345901] [2021-06-05 14:11:23,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490345901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:23,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85053147] [2021-06-05 14:11:23,040 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 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 14:11:23,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:23,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:23,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:23,107 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:11:23,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85053147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:23,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:23,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:11:23,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086530654] [2021-06-05 14:11:23,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:11:23,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:23,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:11:23,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:11:23,108 INFO L87 Difference]: Start difference. First operand 1755 states and 5164 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:23,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:23,258 INFO L93 Difference]: Finished difference Result 2106 states and 5785 transitions. [2021-06-05 14:11:23,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:11:23,258 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 14:11:23,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:23,260 INFO L225 Difference]: With dead ends: 2106 [2021-06-05 14:11:23,260 INFO L226 Difference]: Without dead ends: 2104 [2021-06-05 14:11:23,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:11:23,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-06-05 14:11:23,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1755. [2021-06-05 14:11:23,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1755 states, 1754 states have (on average 2.943557582668187) internal successors, (5163), 1754 states have internal predecessors, (5163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:23,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 5163 transitions. [2021-06-05 14:11:23,283 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 5163 transitions. Word has length 21 [2021-06-05 14:11:23,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:23,283 INFO L482 AbstractCegarLoop]: Abstraction has 1755 states and 5163 transitions. [2021-06-05 14:11:23,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:23,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 5163 transitions. [2021-06-05 14:11:23,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:23,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:23,285 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:23,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39668 [2021-06-05 14:11:23,501 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:23,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:23,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1114189848, now seen corresponding path program 362 times [2021-06-05 14:11:23,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:23,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128506799] [2021-06-05 14:11:23,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:23,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:23,551 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:23,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:23,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128506799] [2021-06-05 14:11:23,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128506799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:23,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997877924] [2021-06-05 14:11:23,551 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 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 14:11:23,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:11:23,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:23,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:23,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:23,625 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:11:23,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997877924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:23,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:23,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 14:11:23,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295231085] [2021-06-05 14:11:23,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:11:23,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:23,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:11:23,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:11:23,626 INFO L87 Difference]: Start difference. First operand 1755 states and 5163 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:23,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:23,733 INFO L93 Difference]: Finished difference Result 2027 states and 5646 transitions. [2021-06-05 14:11:23,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:11:23,733 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 14:11:23,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:23,735 INFO L225 Difference]: With dead ends: 2027 [2021-06-05 14:11:23,735 INFO L226 Difference]: Without dead ends: 2027 [2021-06-05 14:11:23,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:11:23,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-06-05 14:11:23,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1735. [2021-06-05 14:11:23,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1735 states, 1734 states have (on average 2.9371395617070357) internal successors, (5093), 1734 states have internal predecessors, (5093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:23,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1735 states to 1735 states and 5093 transitions. [2021-06-05 14:11:23,760 INFO L78 Accepts]: Start accepts. Automaton has 1735 states and 5093 transitions. Word has length 21 [2021-06-05 14:11:23,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:23,760 INFO L482 AbstractCegarLoop]: Abstraction has 1735 states and 5093 transitions. [2021-06-05 14:11:23,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:23,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1735 states and 5093 transitions. [2021-06-05 14:11:23,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:23,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:23,761 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:23,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39669 [2021-06-05 14:11:23,962 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:23,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:23,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1875263, now seen corresponding path program 363 times [2021-06-05 14:11:23,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:23,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953178229] [2021-06-05 14:11:23,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:23,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:24,023 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:24,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:24,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953178229] [2021-06-05 14:11:24,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953178229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:24,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645150225] [2021-06-05 14:11:24,023 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 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 14:11:24,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:11:24,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:24,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:24,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:24,099 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:24,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645150225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:24,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:24,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:11:24,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964836846] [2021-06-05 14:11:24,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:11:24,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:24,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:11:24,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:11:24,100 INFO L87 Difference]: Start difference. First operand 1735 states and 5093 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:24,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:24,276 INFO L93 Difference]: Finished difference Result 2088 states and 5771 transitions. [2021-06-05 14:11:24,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:11:24,277 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:24,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:24,280 INFO L225 Difference]: With dead ends: 2088 [2021-06-05 14:11:24,280 INFO L226 Difference]: Without dead ends: 2078 [2021-06-05 14:11:24,280 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 115.8ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:11:24,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2021-06-05 14:11:24,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 1761. [2021-06-05 14:11:24,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1760 states have (on average 2.947159090909091) internal successors, (5187), 1760 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:24,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 5187 transitions. [2021-06-05 14:11:24,304 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 5187 transitions. Word has length 21 [2021-06-05 14:11:24,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:24,304 INFO L482 AbstractCegarLoop]: Abstraction has 1761 states and 5187 transitions. [2021-06-05 14:11:24,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:24,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 5187 transitions. [2021-06-05 14:11:24,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:24,306 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:24,306 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:24,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39670,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:24,530 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:24,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:24,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1050203909, now seen corresponding path program 364 times [2021-06-05 14:11:24,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:24,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604378319] [2021-06-05 14:11:24,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:24,595 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:24,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:24,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604378319] [2021-06-05 14:11:24,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604378319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:24,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888475955] [2021-06-05 14:11:24,595 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 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 14:11:24,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:11:24,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:24,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:24,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:24,671 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:24,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888475955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:24,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:24,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:11:24,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370987172] [2021-06-05 14:11:24,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:11:24,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:24,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:11:24,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:11:24,672 INFO L87 Difference]: Start difference. First operand 1761 states and 5187 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:24,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:24,867 INFO L93 Difference]: Finished difference Result 2110 states and 5814 transitions. [2021-06-05 14:11:24,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:11:24,868 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:24,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:24,870 INFO L225 Difference]: With dead ends: 2110 [2021-06-05 14:11:24,870 INFO L226 Difference]: Without dead ends: 2102 [2021-06-05 14:11:24,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 133.2ms TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:11:24,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2021-06-05 14:11:24,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 1765. [2021-06-05 14:11:24,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1765 states, 1764 states have (on average 2.945011337868481) internal successors, (5195), 1764 states have internal predecessors, (5195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:24,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 5195 transitions. [2021-06-05 14:11:24,893 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 5195 transitions. Word has length 21 [2021-06-05 14:11:24,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:24,893 INFO L482 AbstractCegarLoop]: Abstraction has 1765 states and 5195 transitions. [2021-06-05 14:11:24,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:24,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 5195 transitions. [2021-06-05 14:11:24,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:24,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:24,895 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:25,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39671 [2021-06-05 14:11:25,118 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:25,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:25,118 INFO L82 PathProgramCache]: Analyzing trace with hash -915160642, now seen corresponding path program 365 times [2021-06-05 14:11:25,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:25,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57446715] [2021-06-05 14:11:25,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:25,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:25,179 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:25,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:25,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57446715] [2021-06-05 14:11:25,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57446715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:25,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345263457] [2021-06-05 14:11:25,179 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 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 14:11:25,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:11:25,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:25,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:25,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:25,256 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:25,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345263457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:25,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:25,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:11:25,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119937383] [2021-06-05 14:11:25,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:11:25,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:25,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:11:25,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:11:25,257 INFO L87 Difference]: Start difference. First operand 1765 states and 5195 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:25,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:25,376 INFO L93 Difference]: Finished difference Result 2026 states and 5698 transitions. [2021-06-05 14:11:25,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:11:25,377 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:25,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:25,379 INFO L225 Difference]: With dead ends: 2026 [2021-06-05 14:11:25,379 INFO L226 Difference]: Without dead ends: 2026 [2021-06-05 14:11:25,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:11:25,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2021-06-05 14:11:25,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 1701. [2021-06-05 14:11:25,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1700 states have (on average 2.9376470588235293) internal successors, (4994), 1700 states have internal predecessors, (4994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:25,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 4994 transitions. [2021-06-05 14:11:25,396 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 4994 transitions. Word has length 21 [2021-06-05 14:11:25,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:25,397 INFO L482 AbstractCegarLoop]: Abstraction has 1701 states and 4994 transitions. [2021-06-05 14:11:25,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:25,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 4994 transitions. [2021-06-05 14:11:25,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:25,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:25,398 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:25,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39672 [2021-06-05 14:11:25,599 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:25,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:25,599 INFO L82 PathProgramCache]: Analyzing trace with hash 695080127, now seen corresponding path program 366 times [2021-06-05 14:11:25,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:25,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565354795] [2021-06-05 14:11:25,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:25,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:25,655 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:11:25,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:25,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565354795] [2021-06-05 14:11:25,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565354795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:25,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893615601] [2021-06-05 14:11:25,655 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 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 14:11:25,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:11:25,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:25,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:25,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:25,719 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:11:25,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893615601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:25,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:25,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:11:25,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624567128] [2021-06-05 14:11:25,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:11:25,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:25,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:11:25,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:11:25,720 INFO L87 Difference]: Start difference. First operand 1701 states and 4994 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:25,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:25,864 INFO L93 Difference]: Finished difference Result 2422 states and 6653 transitions. [2021-06-05 14:11:25,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:11:25,865 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:25,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:25,867 INFO L225 Difference]: With dead ends: 2422 [2021-06-05 14:11:25,867 INFO L226 Difference]: Without dead ends: 2402 [2021-06-05 14:11:25,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 117.0ms TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:11:25,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2021-06-05 14:11:25,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 1701. [2021-06-05 14:11:25,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1700 states have (on average 2.934705882352941) internal successors, (4989), 1700 states have internal predecessors, (4989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:25,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 4989 transitions. [2021-06-05 14:11:25,886 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 4989 transitions. Word has length 21 [2021-06-05 14:11:25,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:25,886 INFO L482 AbstractCegarLoop]: Abstraction has 1701 states and 4989 transitions. [2021-06-05 14:11:25,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:25,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 4989 transitions. [2021-06-05 14:11:25,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:25,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:25,888 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:26,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39673,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:26,088 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:26,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:26,089 INFO L82 PathProgramCache]: Analyzing trace with hash 567974296, now seen corresponding path program 367 times [2021-06-05 14:11:26,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:26,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306879895] [2021-06-05 14:11:26,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:26,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:26,148 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:11:26,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:26,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306879895] [2021-06-05 14:11:26,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306879895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:26,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984735683] [2021-06-05 14:11:26,149 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 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 14:11:26,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:26,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:26,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:26,226 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:11:26,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984735683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:26,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:26,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:11:26,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642662151] [2021-06-05 14:11:26,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:11:26,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:26,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:11:26,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:11:26,227 INFO L87 Difference]: Start difference. First operand 1701 states and 4989 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:26,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:26,323 INFO L93 Difference]: Finished difference Result 2175 states and 6221 transitions. [2021-06-05 14:11:26,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:11:26,324 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:26,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:26,326 INFO L225 Difference]: With dead ends: 2175 [2021-06-05 14:11:26,326 INFO L226 Difference]: Without dead ends: 2175 [2021-06-05 14:11:26,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:11:26,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2175 states. [2021-06-05 14:11:26,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2175 to 2028. [2021-06-05 14:11:26,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.938332511100148) internal successors, (5956), 2027 states have internal predecessors, (5956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:26,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5956 transitions. [2021-06-05 14:11:26,352 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5956 transitions. Word has length 21 [2021-06-05 14:11:26,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:26,352 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5956 transitions. [2021-06-05 14:11:26,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:26,353 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5956 transitions. [2021-06-05 14:11:26,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:26,355 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:26,355 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:26,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39674,376 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:26,571 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:26,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:26,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1035689605, now seen corresponding path program 368 times [2021-06-05 14:11:26,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:26,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895333722] [2021-06-05 14:11:26,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:26,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:26,654 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:26,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:26,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895333722] [2021-06-05 14:11:26,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895333722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:26,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185790798] [2021-06-05 14:11:26,654 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 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 14:11:26,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:11:26,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:26,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:26,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:26,732 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:26,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185790798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:26,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:26,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:11:26,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909533699] [2021-06-05 14:11:26,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:11:26,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:26,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:11:26,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:11:26,734 INFO L87 Difference]: Start difference. First operand 2028 states and 5956 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:26,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:26,929 INFO L93 Difference]: Finished difference Result 2740 states and 7631 transitions. [2021-06-05 14:11:26,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:11:26,929 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:26,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:26,933 INFO L225 Difference]: With dead ends: 2740 [2021-06-05 14:11:26,933 INFO L226 Difference]: Without dead ends: 2728 [2021-06-05 14:11:26,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 158.4ms TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:11:26,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2021-06-05 14:11:26,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 2062. [2021-06-05 14:11:26,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 2.937894226103833) internal successors, (6055), 2061 states have internal predecessors, (6055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:26,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 6055 transitions. [2021-06-05 14:11:26,961 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 6055 transitions. Word has length 21 [2021-06-05 14:11:26,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:26,961 INFO L482 AbstractCegarLoop]: Abstraction has 2062 states and 6055 transitions. [2021-06-05 14:11:26,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:26,961 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 6055 transitions. [2021-06-05 14:11:26,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:26,963 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:26,963 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:27,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39675,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:27,181 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:27,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:27,182 INFO L82 PathProgramCache]: Analyzing trace with hash -699482882, now seen corresponding path program 369 times [2021-06-05 14:11:27,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:27,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496085149] [2021-06-05 14:11:27,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:27,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:27,251 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:27,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:27,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496085149] [2021-06-05 14:11:27,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496085149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:27,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615289347] [2021-06-05 14:11:27,251 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 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 14:11:27,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:11:27,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:27,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:27,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:27,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615289347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:27,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:27,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:11:27,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590021638] [2021-06-05 14:11:27,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:11:27,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:27,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:11:27,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:11:27,332 INFO L87 Difference]: Start difference. First operand 2062 states and 6055 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:27,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:27,491 INFO L93 Difference]: Finished difference Result 2298 states and 6476 transitions. [2021-06-05 14:11:27,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:11:27,492 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:27,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:27,494 INFO L225 Difference]: With dead ends: 2298 [2021-06-05 14:11:27,494 INFO L226 Difference]: Without dead ends: 2298 [2021-06-05 14:11:27,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 150.3ms TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:11:27,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-06-05 14:11:27,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2031. [2021-06-05 14:11:27,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 2.9369458128078816) internal successors, (5962), 2030 states have internal predecessors, (5962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:27,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 5962 transitions. [2021-06-05 14:11:27,523 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 5962 transitions. Word has length 21 [2021-06-05 14:11:27,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:27,523 INFO L482 AbstractCegarLoop]: Abstraction has 2031 states and 5962 transitions. [2021-06-05 14:11:27,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:27,524 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 5962 transitions. [2021-06-05 14:11:27,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:27,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:27,526 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:27,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39676,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:27,733 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:27,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:27,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1145023551, now seen corresponding path program 370 times [2021-06-05 14:11:27,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:27,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770976977] [2021-06-05 14:11:27,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:27,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:27,800 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:27,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:27,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770976977] [2021-06-05 14:11:27,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770976977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:27,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565925073] [2021-06-05 14:11:27,800 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 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 14:11:27,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:11:27,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:27,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:27,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:27,875 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:27,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565925073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:27,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:27,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:11:27,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239745825] [2021-06-05 14:11:27,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:11:27,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:27,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:11:27,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:11:27,876 INFO L87 Difference]: Start difference. First operand 2031 states and 5962 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:27,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:27,980 INFO L93 Difference]: Finished difference Result 2345 states and 6662 transitions. [2021-06-05 14:11:27,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:11:27,980 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:27,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:27,982 INFO L225 Difference]: With dead ends: 2345 [2021-06-05 14:11:27,983 INFO L226 Difference]: Without dead ends: 2331 [2021-06-05 14:11:27,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:11:27,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-06-05 14:11:27,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 2031. [2021-06-05 14:11:28,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 2.9364532019704432) internal successors, (5961), 2030 states have internal predecessors, (5961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:28,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 5961 transitions. [2021-06-05 14:11:28,003 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 5961 transitions. Word has length 21 [2021-06-05 14:11:28,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:28,003 INFO L482 AbstractCegarLoop]: Abstraction has 2031 states and 5961 transitions. [2021-06-05 14:11:28,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:28,003 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 5961 transitions. [2021-06-05 14:11:28,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:28,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:28,004 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:28,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39677,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:28,209 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:28,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:28,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1335949736, now seen corresponding path program 371 times [2021-06-05 14:11:28,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:28,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151452990] [2021-06-05 14:11:28,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:28,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:28,275 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:28,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:28,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151452990] [2021-06-05 14:11:28,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151452990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:28,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329307928] [2021-06-05 14:11:28,275 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 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 14:11:28,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:11:28,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:28,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:28,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:28,343 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:28,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329307928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:28,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:28,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:11:28,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014193321] [2021-06-05 14:11:28,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:11:28,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:28,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:11:28,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:11:28,344 INFO L87 Difference]: Start difference. First operand 2031 states and 5961 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:28,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:28,582 INFO L93 Difference]: Finished difference Result 2359 states and 6653 transitions. [2021-06-05 14:11:28,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:11:28,583 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:28,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:28,585 INFO L225 Difference]: With dead ends: 2359 [2021-06-05 14:11:28,585 INFO L226 Difference]: Without dead ends: 2359 [2021-06-05 14:11:28,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 200.4ms TimeCoverageRelationStatistics Valid=334, Invalid=658, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:11:28,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2021-06-05 14:11:28,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2104. [2021-06-05 14:11:28,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 2103 states have (on average 2.9381835473133617) internal successors, (6179), 2103 states have internal predecessors, (6179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:28,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 6179 transitions. [2021-06-05 14:11:28,606 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 6179 transitions. Word has length 21 [2021-06-05 14:11:28,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:28,606 INFO L482 AbstractCegarLoop]: Abstraction has 2104 states and 6179 transitions. [2021-06-05 14:11:28,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:28,606 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 6179 transitions. [2021-06-05 14:11:28,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:28,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:28,608 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:28,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39678 [2021-06-05 14:11:28,809 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:28,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:28,809 INFO L82 PathProgramCache]: Analyzing trace with hash 27654651, now seen corresponding path program 372 times [2021-06-05 14:11:28,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:28,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936332049] [2021-06-05 14:11:28,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:28,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:28,882 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:28,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:28,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936332049] [2021-06-05 14:11:28,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936332049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:28,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434836388] [2021-06-05 14:11:28,882 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 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 14:11:28,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:11:28,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:28,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:28,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:28,971 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:28,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434836388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:28,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:28,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:11:28,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877995515] [2021-06-05 14:11:28,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:11:28,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:28,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:11:28,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:11:28,980 INFO L87 Difference]: Start difference. First operand 2104 states and 6179 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:29,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:29,075 INFO L93 Difference]: Finished difference Result 2399 states and 6834 transitions. [2021-06-05 14:11:29,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:11:29,076 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:29,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:29,079 INFO L225 Difference]: With dead ends: 2399 [2021-06-05 14:11:29,079 INFO L226 Difference]: Without dead ends: 2383 [2021-06-05 14:11:29,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:11:29,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2021-06-05 14:11:29,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 2104. [2021-06-05 14:11:29,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 2103 states have (on average 2.9377080361388495) internal successors, (6178), 2103 states have internal predecessors, (6178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:29,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 6178 transitions. [2021-06-05 14:11:29,102 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 6178 transitions. Word has length 21 [2021-06-05 14:11:29,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:29,102 INFO L482 AbstractCegarLoop]: Abstraction has 2104 states and 6178 transitions. [2021-06-05 14:11:29,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:29,102 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 6178 transitions. [2021-06-05 14:11:29,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:29,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:29,104 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:29,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39679 [2021-06-05 14:11:29,304 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:29,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:29,304 INFO L82 PathProgramCache]: Analyzing trace with hash 408414270, now seen corresponding path program 373 times [2021-06-05 14:11:29,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:29,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033264767] [2021-06-05 14:11:29,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:29,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:29,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:29,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033264767] [2021-06-05 14:11:29,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033264767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:29,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423281133] [2021-06-05 14:11:29,372 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 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 14:11:29,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:29,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:29,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:29,440 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:29,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423281133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:29,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:29,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:11:29,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214111440] [2021-06-05 14:11:29,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:11:29,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:29,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:11:29,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:11:29,441 INFO L87 Difference]: Start difference. First operand 2104 states and 6178 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:29,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:29,701 INFO L93 Difference]: Finished difference Result 2543 states and 7159 transitions. [2021-06-05 14:11:29,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:11:29,701 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:29,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:29,703 INFO L225 Difference]: With dead ends: 2543 [2021-06-05 14:11:29,703 INFO L226 Difference]: Without dead ends: 2543 [2021-06-05 14:11:29,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 227.7ms TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:11:29,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2021-06-05 14:11:29,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2128. [2021-06-05 14:11:29,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.938410907381288) internal successors, (6250), 2127 states have internal predecessors, (6250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:29,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 6250 transitions. [2021-06-05 14:11:29,725 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 6250 transitions. Word has length 21 [2021-06-05 14:11:29,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:29,725 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 6250 transitions. [2021-06-05 14:11:29,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:29,725 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 6250 transitions. [2021-06-05 14:11:29,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:29,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:29,727 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:29,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39680,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:29,927 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:29,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:29,927 INFO L82 PathProgramCache]: Analyzing trace with hash -962719899, now seen corresponding path program 374 times [2021-06-05 14:11:29,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:29,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454580527] [2021-06-05 14:11:29,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:29,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:29,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:29,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454580527] [2021-06-05 14:11:29,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454580527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:29,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602754110] [2021-06-05 14:11:29,989 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 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 14:11:30,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:11:30,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:30,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:30,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:30,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602754110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:30,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:30,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:11:30,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608233163] [2021-06-05 14:11:30,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:11:30,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:30,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:11:30,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:11:30,058 INFO L87 Difference]: Start difference. First operand 2128 states and 6250 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:30,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:30,159 INFO L93 Difference]: Finished difference Result 2474 states and 6959 transitions. [2021-06-05 14:11:30,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:11:30,159 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:30,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:30,161 INFO L225 Difference]: With dead ends: 2474 [2021-06-05 14:11:30,161 INFO L226 Difference]: Without dead ends: 2474 [2021-06-05 14:11:30,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 83.0ms TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:11:30,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2021-06-05 14:11:30,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 2190. [2021-06-05 14:11:30,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 2.9520328917313843) internal successors, (6462), 2189 states have internal predecessors, (6462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:30,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 6462 transitions. [2021-06-05 14:11:30,183 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 6462 transitions. Word has length 21 [2021-06-05 14:11:30,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:30,183 INFO L482 AbstractCegarLoop]: Abstraction has 2190 states and 6462 transitions. [2021-06-05 14:11:30,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:30,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 6462 transitions. [2021-06-05 14:11:30,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:30,185 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:30,185 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:30,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39681 [2021-06-05 14:11:30,386 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:30,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:30,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1552318936, now seen corresponding path program 375 times [2021-06-05 14:11:30,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:30,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345441397] [2021-06-05 14:11:30,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:30,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:30,455 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:30,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:30,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345441397] [2021-06-05 14:11:30,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345441397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:30,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061674638] [2021-06-05 14:11:30,456 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 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 14:11:30,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:11:30,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:30,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:30,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:30,531 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:30,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061674638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:30,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:30,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:11:30,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240790188] [2021-06-05 14:11:30,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:11:30,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:30,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:11:30,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:11:30,531 INFO L87 Difference]: Start difference. First operand 2190 states and 6462 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:30,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:30,747 INFO L93 Difference]: Finished difference Result 2504 states and 7007 transitions. [2021-06-05 14:11:30,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:11:30,748 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:30,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:30,750 INFO L225 Difference]: With dead ends: 2504 [2021-06-05 14:11:30,750 INFO L226 Difference]: Without dead ends: 2500 [2021-06-05 14:11:30,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 158.6ms TimeCoverageRelationStatistics Valid=227, Invalid=423, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:11:30,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2500 states. [2021-06-05 14:11:30,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2500 to 2209. [2021-06-05 14:11:30,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 2208 states have (on average 2.9556159420289854) internal successors, (6526), 2208 states have internal predecessors, (6526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:30,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 6526 transitions. [2021-06-05 14:11:30,772 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 6526 transitions. Word has length 21 [2021-06-05 14:11:30,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:30,772 INFO L482 AbstractCegarLoop]: Abstraction has 2209 states and 6526 transitions. [2021-06-05 14:11:30,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:30,773 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 6526 transitions. [2021-06-05 14:11:30,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:30,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:30,774 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:30,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39682,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:30,976 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:30,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:30,976 INFO L82 PathProgramCache]: Analyzing trace with hash -576518785, now seen corresponding path program 376 times [2021-06-05 14:11:30,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:30,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509571890] [2021-06-05 14:11:30,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:30,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:31,029 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:31,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:31,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509571890] [2021-06-05 14:11:31,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509571890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:31,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809480646] [2021-06-05 14:11:31,030 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 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 14:11:31,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:11:31,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:31,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:31,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:31,109 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 39 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:31,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809480646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:31,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:31,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:11:31,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851744193] [2021-06-05 14:11:31,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:11:31,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:31,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:11:31,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:11:31,110 INFO L87 Difference]: Start difference. First operand 2209 states and 6526 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:31,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:31,243 INFO L93 Difference]: Finished difference Result 2434 states and 6886 transitions. [2021-06-05 14:11:31,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:11:31,244 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:31,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:31,246 INFO L225 Difference]: With dead ends: 2434 [2021-06-05 14:11:31,246 INFO L226 Difference]: Without dead ends: 2428 [2021-06-05 14:11:31,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:11:31,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2021-06-05 14:11:31,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 2191. [2021-06-05 14:11:31,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2191 states, 2190 states have (on average 2.948401826484018) internal successors, (6457), 2190 states have internal predecessors, (6457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:31,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 6457 transitions. [2021-06-05 14:11:31,268 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 6457 transitions. Word has length 21 [2021-06-05 14:11:31,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:31,268 INFO L482 AbstractCegarLoop]: Abstraction has 2191 states and 6457 transitions. [2021-06-05 14:11:31,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:31,268 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 6457 transitions. [2021-06-05 14:11:31,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:31,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:31,270 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:31,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39683,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:31,470 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:31,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:31,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1237782568, now seen corresponding path program 377 times [2021-06-05 14:11:31,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:31,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665516793] [2021-06-05 14:11:31,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:31,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:31,533 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:31,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:31,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665516793] [2021-06-05 14:11:31,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665516793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:31,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198734615] [2021-06-05 14:11:31,533 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 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 14:11:31,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:11:31,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:31,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:31,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:31,597 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:31,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198734615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:31,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:31,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:11:31,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944254508] [2021-06-05 14:11:31,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:11:31,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:31,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:11:31,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:11:31,598 INFO L87 Difference]: Start difference. First operand 2191 states and 6457 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:31,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:31,675 INFO L93 Difference]: Finished difference Result 2597 states and 7234 transitions. [2021-06-05 14:11:31,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:11:31,675 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:31,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:31,677 INFO L225 Difference]: With dead ends: 2597 [2021-06-05 14:11:31,677 INFO L226 Difference]: Without dead ends: 2597 [2021-06-05 14:11:31,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=101, Invalid=139, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:11:31,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2597 states. [2021-06-05 14:11:31,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2597 to 2201. [2021-06-05 14:11:31,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 2200 states have (on average 2.945909090909091) internal successors, (6481), 2200 states have internal predecessors, (6481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:31,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 6481 transitions. [2021-06-05 14:11:31,700 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 6481 transitions. Word has length 21 [2021-06-05 14:11:31,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:31,700 INFO L482 AbstractCegarLoop]: Abstraction has 2201 states and 6481 transitions. [2021-06-05 14:11:31,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:31,700 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 6481 transitions. [2021-06-05 14:11:31,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:31,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:31,702 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:31,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39684,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:31,902 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:31,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:31,903 INFO L82 PathProgramCache]: Analyzing trace with hash 577001109, now seen corresponding path program 378 times [2021-06-05 14:11:31,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:31,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850856817] [2021-06-05 14:11:31,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:31,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:31,955 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:31,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:31,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850856817] [2021-06-05 14:11:31,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850856817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:31,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657452255] [2021-06-05 14:11:31,955 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 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 14:11:31,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:11:31,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:31,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:31,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:32,015 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:32,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657452255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:32,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:32,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:11:32,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729323050] [2021-06-05 14:11:32,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:11:32,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:32,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:11:32,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:11:32,016 INFO L87 Difference]: Start difference. First operand 2201 states and 6481 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:32,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:32,140 INFO L93 Difference]: Finished difference Result 2455 states and 6971 transitions. [2021-06-05 14:11:32,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:11:32,141 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:32,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:32,143 INFO L225 Difference]: With dead ends: 2455 [2021-06-05 14:11:32,143 INFO L226 Difference]: Without dead ends: 2449 [2021-06-05 14:11:32,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=164, Invalid=298, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:11:32,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2449 states. [2021-06-05 14:11:32,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2449 to 2201. [2021-06-05 14:11:32,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 2200 states have (on average 2.9454545454545453) internal successors, (6480), 2200 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:32,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 6480 transitions. [2021-06-05 14:11:32,165 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 6480 transitions. Word has length 21 [2021-06-05 14:11:32,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:32,165 INFO L482 AbstractCegarLoop]: Abstraction has 2201 states and 6480 transitions. [2021-06-05 14:11:32,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:32,165 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 6480 transitions. [2021-06-05 14:11:32,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:32,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:32,168 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:32,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39685,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:32,381 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:32,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:32,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1534180504, now seen corresponding path program 379 times [2021-06-05 14:11:32,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:32,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387151889] [2021-06-05 14:11:32,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:32,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:32,442 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:32,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:32,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387151889] [2021-06-05 14:11:32,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387151889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:32,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191142940] [2021-06-05 14:11:32,442 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 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 14:11:32,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:32,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:32,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:32,503 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:32,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191142940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:32,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:32,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:11:32,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064958413] [2021-06-05 14:11:32,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:11:32,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:32,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:11:32,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:11:32,504 INFO L87 Difference]: Start difference. First operand 2201 states and 6480 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:32,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:32,590 INFO L93 Difference]: Finished difference Result 2588 states and 7244 transitions. [2021-06-05 14:11:32,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:11:32,590 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:32,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:32,592 INFO L225 Difference]: With dead ends: 2588 [2021-06-05 14:11:32,592 INFO L226 Difference]: Without dead ends: 2588 [2021-06-05 14:11:32,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:11:32,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-06-05 14:11:32,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 2203. [2021-06-05 14:11:32,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 2202 states have (on average 2.9436875567665757) internal successors, (6482), 2202 states have internal predecessors, (6482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:32,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 6482 transitions. [2021-06-05 14:11:32,614 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 6482 transitions. Word has length 21 [2021-06-05 14:11:32,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:32,614 INFO L482 AbstractCegarLoop]: Abstraction has 2203 states and 6482 transitions. [2021-06-05 14:11:32,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:32,615 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 6482 transitions. [2021-06-05 14:11:32,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:32,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:32,616 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:32,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39686,388 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:32,817 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:32,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:32,817 INFO L82 PathProgramCache]: Analyzing trace with hash 148135359, now seen corresponding path program 380 times [2021-06-05 14:11:32,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:32,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336214158] [2021-06-05 14:11:32,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:32,877 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:32,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:32,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336214158] [2021-06-05 14:11:32,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336214158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:32,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470717574] [2021-06-05 14:11:32,877 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 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 14:11:32,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:11:32,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:32,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:32,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:32,941 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:32,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470717574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:32,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:32,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:11:32,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625075600] [2021-06-05 14:11:32,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:11:32,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:32,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:11:32,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:11:32,942 INFO L87 Difference]: Start difference. First operand 2203 states and 6482 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:33,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:33,081 INFO L93 Difference]: Finished difference Result 2575 states and 7311 transitions. [2021-06-05 14:11:33,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:11:33,081 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:33,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:33,084 INFO L225 Difference]: With dead ends: 2575 [2021-06-05 14:11:33,084 INFO L226 Difference]: Without dead ends: 2561 [2021-06-05 14:11:33,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=172, Invalid=334, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:11:33,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2561 states. [2021-06-05 14:11:33,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2561 to 2203. [2021-06-05 14:11:33,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 2202 states have (on average 2.9432334241598546) internal successors, (6481), 2202 states have internal predecessors, (6481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:33,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 6481 transitions. [2021-06-05 14:11:33,108 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 6481 transitions. Word has length 21 [2021-06-05 14:11:33,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:33,108 INFO L482 AbstractCegarLoop]: Abstraction has 2203 states and 6481 transitions. [2021-06-05 14:11:33,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:33,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 6481 transitions. [2021-06-05 14:11:33,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:33,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:33,110 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:33,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39687,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:33,311 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:33,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:33,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1962129368, now seen corresponding path program 381 times [2021-06-05 14:11:33,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:33,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373304413] [2021-06-05 14:11:33,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:33,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:33,380 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:33,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:33,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373304413] [2021-06-05 14:11:33,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373304413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:33,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772621457] [2021-06-05 14:11:33,381 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 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 14:11:33,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:11:33,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:33,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:33,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:33,452 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:33,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772621457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:33,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:33,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:11:33,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21767345] [2021-06-05 14:11:33,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:11:33,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:33,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:11:33,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:11:33,453 INFO L87 Difference]: Start difference. First operand 2203 states and 6481 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:33,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:33,714 INFO L93 Difference]: Finished difference Result 2783 states and 7906 transitions. [2021-06-05 14:11:33,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:11:33,714 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:33,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:33,716 INFO L225 Difference]: With dead ends: 2783 [2021-06-05 14:11:33,716 INFO L226 Difference]: Without dead ends: 2783 [2021-06-05 14:11:33,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 231.5ms TimeCoverageRelationStatistics Valid=382, Invalid=740, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:11:33,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2021-06-05 14:11:33,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2246. [2021-06-05 14:11:33,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2246 states, 2245 states have (on average 2.9469933184855233) internal successors, (6616), 2245 states have internal predecessors, (6616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:33,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2246 states to 2246 states and 6616 transitions. [2021-06-05 14:11:33,740 INFO L78 Accepts]: Start accepts. Automaton has 2246 states and 6616 transitions. Word has length 21 [2021-06-05 14:11:33,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:33,740 INFO L482 AbstractCegarLoop]: Abstraction has 2246 states and 6616 transitions. [2021-06-05 14:11:33,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:33,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2246 states and 6616 transitions. [2021-06-05 14:11:33,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:33,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:33,742 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:33,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39688 [2021-06-05 14:11:33,942 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:33,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:33,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1611155303, now seen corresponding path program 382 times [2021-06-05 14:11:33,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:33,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932513876] [2021-06-05 14:11:33,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:34,001 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:34,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:34,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932513876] [2021-06-05 14:11:34,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932513876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:34,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196307098] [2021-06-05 14:11:34,002 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 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 14:11:34,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:11:34,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:34,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:34,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:34,064 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:34,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196307098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:34,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:34,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:11:34,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339627941] [2021-06-05 14:11:34,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:11:34,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:34,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:11:34,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:11:34,065 INFO L87 Difference]: Start difference. First operand 2246 states and 6616 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:34,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:34,235 INFO L93 Difference]: Finished difference Result 2809 states and 7847 transitions. [2021-06-05 14:11:34,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:11:34,235 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:34,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:34,238 INFO L225 Difference]: With dead ends: 2809 [2021-06-05 14:11:34,238 INFO L226 Difference]: Without dead ends: 2795 [2021-06-05 14:11:34,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 129.4ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:11:34,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2795 states. [2021-06-05 14:11:34,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2795 to 2250. [2021-06-05 14:11:34,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2250 states, 2249 states have (on average 2.94619831036016) internal successors, (6626), 2249 states have internal predecessors, (6626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:34,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2250 states to 2250 states and 6626 transitions. [2021-06-05 14:11:34,264 INFO L78 Accepts]: Start accepts. Automaton has 2250 states and 6626 transitions. Word has length 21 [2021-06-05 14:11:34,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:34,264 INFO L482 AbstractCegarLoop]: Abstraction has 2250 states and 6626 transitions. [2021-06-05 14:11:34,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:34,264 INFO L276 IsEmpty]: Start isEmpty. Operand 2250 states and 6626 transitions. [2021-06-05 14:11:34,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:34,266 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:34,266 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:34,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39689 [2021-06-05 14:11:34,466 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:34,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:34,467 INFO L82 PathProgramCache]: Analyzing trace with hash 202838706, now seen corresponding path program 383 times [2021-06-05 14:11:34,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:34,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934340672] [2021-06-05 14:11:34,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:34,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:34,534 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:34,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:34,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934340672] [2021-06-05 14:11:34,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934340672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:34,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425267847] [2021-06-05 14:11:34,535 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 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 14:11:34,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:11:34,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:34,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:34,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:34,606 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:34,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425267847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:34,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:34,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:11:34,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831121389] [2021-06-05 14:11:34,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:11:34,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:34,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:11:34,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:11:34,607 INFO L87 Difference]: Start difference. First operand 2250 states and 6626 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:34,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:34,815 INFO L93 Difference]: Finished difference Result 2507 states and 7160 transitions. [2021-06-05 14:11:34,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:11:34,816 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:34,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:34,818 INFO L225 Difference]: With dead ends: 2507 [2021-06-05 14:11:34,818 INFO L226 Difference]: Without dead ends: 2507 [2021-06-05 14:11:34,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 184.6ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:11:34,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2021-06-05 14:11:34,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2256. [2021-06-05 14:11:34,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 2.946341463414634) internal successors, (6644), 2255 states have internal predecessors, (6644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:34,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 6644 transitions. [2021-06-05 14:11:34,840 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 6644 transitions. Word has length 21 [2021-06-05 14:11:34,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:34,840 INFO L482 AbstractCegarLoop]: Abstraction has 2256 states and 6644 transitions. [2021-06-05 14:11:34,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:34,840 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 6644 transitions. [2021-06-05 14:11:34,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:34,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:34,842 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:35,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39690 [2021-06-05 14:11:35,043 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:35,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:35,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1566443093, now seen corresponding path program 384 times [2021-06-05 14:11:35,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:35,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674623511] [2021-06-05 14:11:35,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:35,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:35,106 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:35,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:35,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674623511] [2021-06-05 14:11:35,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674623511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:35,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24104922] [2021-06-05 14:11:35,107 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 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 14:11:35,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:11:35,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:35,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:35,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:35,177 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:35,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24104922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:35,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:35,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:11:35,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846673456] [2021-06-05 14:11:35,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:11:35,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:35,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:11:35,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:11:35,178 INFO L87 Difference]: Start difference. First operand 2256 states and 6644 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:35,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:35,255 INFO L93 Difference]: Finished difference Result 2564 states and 7327 transitions. [2021-06-05 14:11:35,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:11:35,256 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:35,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:35,258 INFO L225 Difference]: With dead ends: 2564 [2021-06-05 14:11:35,258 INFO L226 Difference]: Without dead ends: 2548 [2021-06-05 14:11:35,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 87.0ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:11:35,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2021-06-05 14:11:35,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 2256. [2021-06-05 14:11:35,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 2.9458980044345897) internal successors, (6643), 2255 states have internal predecessors, (6643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:35,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 6643 transitions. [2021-06-05 14:11:35,280 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 6643 transitions. Word has length 21 [2021-06-05 14:11:35,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:35,280 INFO L482 AbstractCegarLoop]: Abstraction has 2256 states and 6643 transitions. [2021-06-05 14:11:35,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:35,280 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 6643 transitions. [2021-06-05 14:11:35,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:35,282 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:35,282 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:35,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39691,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:35,483 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:35,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:35,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1947202712, now seen corresponding path program 385 times [2021-06-05 14:11:35,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:35,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979276618] [2021-06-05 14:11:35,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:35,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:35,570 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:35,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:35,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979276618] [2021-06-05 14:11:35,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979276618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:35,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353312183] [2021-06-05 14:11:35,570 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 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 14:11:35,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:35,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:35,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:35,639 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:35,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353312183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:35,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:35,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:11:35,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371799985] [2021-06-05 14:11:35,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:11:35,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:35,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:11:35,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:11:35,640 INFO L87 Difference]: Start difference. First operand 2256 states and 6643 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:35,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:35,871 INFO L93 Difference]: Finished difference Result 2604 states and 7425 transitions. [2021-06-05 14:11:35,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:11:35,871 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:35,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:35,873 INFO L225 Difference]: With dead ends: 2604 [2021-06-05 14:11:35,873 INFO L226 Difference]: Without dead ends: 2604 [2021-06-05 14:11:35,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 229.9ms TimeCoverageRelationStatistics Valid=384, Invalid=738, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:11:35,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2021-06-05 14:11:35,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 2270. [2021-06-05 14:11:35,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2270 states, 2269 states have (on average 2.9457910973997357) internal successors, (6684), 2269 states have internal predecessors, (6684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:35,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2270 states to 2270 states and 6684 transitions. [2021-06-05 14:11:35,896 INFO L78 Accepts]: Start accepts. Automaton has 2270 states and 6684 transitions. Word has length 21 [2021-06-05 14:11:35,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:35,896 INFO L482 AbstractCegarLoop]: Abstraction has 2270 states and 6684 transitions. [2021-06-05 14:11:35,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:35,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2270 states and 6684 transitions. [2021-06-05 14:11:35,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:35,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:35,899 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:36,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39692,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:36,099 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:36,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:36,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1278888389, now seen corresponding path program 386 times [2021-06-05 14:11:36,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:36,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112808536] [2021-06-05 14:11:36,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:36,150 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:36,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:36,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112808536] [2021-06-05 14:11:36,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112808536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:36,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638488622] [2021-06-05 14:11:36,150 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 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 14:11:36,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:11:36,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:36,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:36,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:36,210 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:36,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638488622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:36,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:36,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:11:36,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309183322] [2021-06-05 14:11:36,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:11:36,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:36,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:11:36,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:11:36,210 INFO L87 Difference]: Start difference. First operand 2270 states and 6684 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:36,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:36,285 INFO L93 Difference]: Finished difference Result 2879 states and 8100 transitions. [2021-06-05 14:11:36,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:11:36,286 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:36,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:36,289 INFO L225 Difference]: With dead ends: 2879 [2021-06-05 14:11:36,289 INFO L226 Difference]: Without dead ends: 2879 [2021-06-05 14:11:36,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:11:36,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2879 states. [2021-06-05 14:11:36,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2879 to 2519. [2021-06-05 14:11:36,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2519 states, 2518 states have (on average 2.9785544082605244) internal successors, (7500), 2518 states have internal predecessors, (7500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:36,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2519 states to 2519 states and 7500 transitions. [2021-06-05 14:11:36,315 INFO L78 Accepts]: Start accepts. Automaton has 2519 states and 7500 transitions. Word has length 21 [2021-06-05 14:11:36,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:36,315 INFO L482 AbstractCegarLoop]: Abstraction has 2519 states and 7500 transitions. [2021-06-05 14:11:36,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:36,315 INFO L276 IsEmpty]: Start isEmpty. Operand 2519 states and 7500 transitions. [2021-06-05 14:11:36,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:36,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:36,317 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:36,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39693,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:36,517 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:36,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:36,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1197758104, now seen corresponding path program 387 times [2021-06-05 14:11:36,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:36,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301310334] [2021-06-05 14:11:36,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:36,569 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:36,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:36,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301310334] [2021-06-05 14:11:36,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301310334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:36,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618446441] [2021-06-05 14:11:36,569 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 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 14:11:36,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:11:36,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:36,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:36,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:36,633 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:36,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618446441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:36,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:36,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:11:36,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017062760] [2021-06-05 14:11:36,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:11:36,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:36,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:11:36,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:11:36,634 INFO L87 Difference]: Start difference. First operand 2519 states and 7500 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:36,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:36,796 INFO L93 Difference]: Finished difference Result 2785 states and 7952 transitions. [2021-06-05 14:11:36,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:11:36,796 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:36,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:36,799 INFO L225 Difference]: With dead ends: 2785 [2021-06-05 14:11:36,799 INFO L226 Difference]: Without dead ends: 2783 [2021-06-05 14:11:36,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:11:36,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2021-06-05 14:11:36,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2541. [2021-06-05 14:11:36,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2541 states, 2540 states have (on average 2.984645669291339) internal successors, (7581), 2540 states have internal predecessors, (7581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:36,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2541 states to 2541 states and 7581 transitions. [2021-06-05 14:11:36,830 INFO L78 Accepts]: Start accepts. Automaton has 2541 states and 7581 transitions. Word has length 21 [2021-06-05 14:11:36,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:36,830 INFO L482 AbstractCegarLoop]: Abstraction has 2541 states and 7581 transitions. [2021-06-05 14:11:36,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:36,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2541 states and 7581 transitions. [2021-06-05 14:11:36,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:36,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:36,833 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:37,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39694,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:37,034 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:37,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:37,034 INFO L82 PathProgramCache]: Analyzing trace with hash 315839103, now seen corresponding path program 388 times [2021-06-05 14:11:37,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:37,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243257819] [2021-06-05 14:11:37,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:37,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:37,112 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 38 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:37,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:37,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243257819] [2021-06-05 14:11:37,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243257819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:37,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689041280] [2021-06-05 14:11:37,113 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 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 14:11:37,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:11:37,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:37,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:37,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:37,169 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 39 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:37,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689041280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:37,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:37,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:11:37,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025842142] [2021-06-05 14:11:37,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:11:37,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:37,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:11:37,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:11:37,170 INFO L87 Difference]: Start difference. First operand 2541 states and 7581 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:37,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:37,315 INFO L93 Difference]: Finished difference Result 2878 states and 8139 transitions. [2021-06-05 14:11:37,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:11:37,316 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:37,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:37,318 INFO L225 Difference]: With dead ends: 2878 [2021-06-05 14:11:37,318 INFO L226 Difference]: Without dead ends: 2876 [2021-06-05 14:11:37,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 119.4ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:11:37,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2021-06-05 14:11:37,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2523. [2021-06-05 14:11:37,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2523 states, 2522 states have (on average 2.978191911181602) internal successors, (7511), 2522 states have internal predecessors, (7511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:37,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2523 states to 2523 states and 7511 transitions. [2021-06-05 14:11:37,346 INFO L78 Accepts]: Start accepts. Automaton has 2523 states and 7511 transitions. Word has length 21 [2021-06-05 14:11:37,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:37,346 INFO L482 AbstractCegarLoop]: Abstraction has 2523 states and 7511 transitions. [2021-06-05 14:11:37,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:37,346 INFO L276 IsEmpty]: Start isEmpty. Operand 2523 states and 7511 transitions. [2021-06-05 14:11:37,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:37,348 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:37,348 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:37,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39695 [2021-06-05 14:11:37,549 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:37,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:37,549 INFO L82 PathProgramCache]: Analyzing trace with hash -345424680, now seen corresponding path program 389 times [2021-06-05 14:11:37,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:37,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572013351] [2021-06-05 14:11:37,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:37,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:37,600 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:37,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:37,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572013351] [2021-06-05 14:11:37,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572013351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:37,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460466747] [2021-06-05 14:11:37,601 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 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 14:11:37,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 14:11:37,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:37,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:37,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:37,663 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:37,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460466747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:37,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:37,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:11:37,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100487352] [2021-06-05 14:11:37,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:11:37,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:37,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:11:37,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:11:37,663 INFO L87 Difference]: Start difference. First operand 2523 states and 7511 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:37,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:37,766 INFO L93 Difference]: Finished difference Result 2854 states and 8107 transitions. [2021-06-05 14:11:37,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:11:37,767 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:37,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:37,769 INFO L225 Difference]: With dead ends: 2854 [2021-06-05 14:11:37,769 INFO L226 Difference]: Without dead ends: 2854 [2021-06-05 14:11:37,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:11:37,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-06-05 14:11:37,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 2529. [2021-06-05 14:11:37,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 2528 states have (on average 2.978243670886076) internal successors, (7529), 2528 states have internal predecessors, (7529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:37,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 7529 transitions. [2021-06-05 14:11:37,794 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 7529 transitions. Word has length 21 [2021-06-05 14:11:37,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:37,794 INFO L482 AbstractCegarLoop]: Abstraction has 2529 states and 7529 transitions. [2021-06-05 14:11:37,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:37,794 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 7529 transitions. [2021-06-05 14:11:37,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:37,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:37,796 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:37,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39696,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:37,997 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:37,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:37,997 INFO L82 PathProgramCache]: Analyzing trace with hash 931503419, now seen corresponding path program 390 times [2021-06-05 14:11:37,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:37,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719551152] [2021-06-05 14:11:37,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:38,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:38,052 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:38,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:38,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719551152] [2021-06-05 14:11:38,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719551152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:38,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698534373] [2021-06-05 14:11:38,053 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 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 14:11:38,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:11:38,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:38,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:38,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:38,119 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:38,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698534373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:38,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:38,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:11:38,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482103935] [2021-06-05 14:11:38,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:11:38,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:38,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:11:38,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:11:38,120 INFO L87 Difference]: Start difference. First operand 2529 states and 7529 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:38,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:38,259 INFO L93 Difference]: Finished difference Result 2971 states and 8408 transitions. [2021-06-05 14:11:38,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:11:38,259 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:38,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:38,262 INFO L225 Difference]: With dead ends: 2971 [2021-06-05 14:11:38,262 INFO L226 Difference]: Without dead ends: 2967 [2021-06-05 14:11:38,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:11:38,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2967 states. [2021-06-05 14:11:38,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2967 to 2529. [2021-06-05 14:11:38,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 2528 states have (on average 2.9778481012658227) internal successors, (7528), 2528 states have internal predecessors, (7528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:38,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 7528 transitions. [2021-06-05 14:11:38,288 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 7528 transitions. Word has length 21 [2021-06-05 14:11:38,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:38,288 INFO L482 AbstractCegarLoop]: Abstraction has 2529 states and 7528 transitions. [2021-06-05 14:11:38,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:38,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 7528 transitions. [2021-06-05 14:11:38,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:38,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:38,290 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:38,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39697,399 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:38,491 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:38,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:38,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1888682814, now seen corresponding path program 391 times [2021-06-05 14:11:38,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:38,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991642337] [2021-06-05 14:11:38,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:38,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:38,541 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:38,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:38,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991642337] [2021-06-05 14:11:38,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991642337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:38,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16227543] [2021-06-05 14:11:38,542 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 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 14:11:38,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:38,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:38,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:38,603 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:38,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16227543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:38,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:38,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:11:38,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757555357] [2021-06-05 14:11:38,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:11:38,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:38,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:11:38,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:11:38,603 INFO L87 Difference]: Start difference. First operand 2529 states and 7528 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:38,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:38,735 INFO L93 Difference]: Finished difference Result 2883 states and 8203 transitions. [2021-06-05 14:11:38,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:11:38,735 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:38,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:38,738 INFO L225 Difference]: With dead ends: 2883 [2021-06-05 14:11:38,738 INFO L226 Difference]: Without dead ends: 2883 [2021-06-05 14:11:38,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=183, Invalid=323, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:11:38,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2883 states. [2021-06-05 14:11:38,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2883 to 2549. [2021-06-05 14:11:38,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2549 states, 2548 states have (on average 2.9803767660910516) internal successors, (7594), 2548 states have internal predecessors, (7594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:38,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2549 states to 2549 states and 7594 transitions. [2021-06-05 14:11:38,763 INFO L78 Accepts]: Start accepts. Automaton has 2549 states and 7594 transitions. Word has length 21 [2021-06-05 14:11:38,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:38,763 INFO L482 AbstractCegarLoop]: Abstraction has 2549 states and 7594 transitions. [2021-06-05 14:11:38,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:38,763 INFO L276 IsEmpty]: Start isEmpty. Operand 2549 states and 7594 transitions. [2021-06-05 14:11:38,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:38,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:38,765 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:38,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39698,400 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:38,965 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:38,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:38,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1457739265, now seen corresponding path program 392 times [2021-06-05 14:11:38,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:38,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104834433] [2021-06-05 14:11:38,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:38,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:39,013 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:39,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:39,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104834433] [2021-06-05 14:11:39,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104834433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:39,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770581831] [2021-06-05 14:11:39,013 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 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 14:11:39,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:11:39,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:39,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:39,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:39,069 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:11:39,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770581831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:39,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:39,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 14:11:39,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876352337] [2021-06-05 14:11:39,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:11:39,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:39,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:11:39,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:11:39,069 INFO L87 Difference]: Start difference. First operand 2549 states and 7594 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:39,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:39,206 INFO L93 Difference]: Finished difference Result 2952 states and 8363 transitions. [2021-06-05 14:11:39,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:11:39,207 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:39,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:39,209 INFO L225 Difference]: With dead ends: 2952 [2021-06-05 14:11:39,209 INFO L226 Difference]: Without dead ends: 2946 [2021-06-05 14:11:39,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:11:39,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2946 states. [2021-06-05 14:11:39,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2946 to 2549. [2021-06-05 14:11:39,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2549 states, 2548 states have (on average 2.979984301412873) internal successors, (7593), 2548 states have internal predecessors, (7593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:39,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2549 states to 2549 states and 7593 transitions. [2021-06-05 14:11:39,236 INFO L78 Accepts]: Start accepts. Automaton has 2549 states and 7593 transitions. Word has length 21 [2021-06-05 14:11:39,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:39,236 INFO L482 AbstractCegarLoop]: Abstraction has 2549 states and 7593 transitions. [2021-06-05 14:11:39,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:39,236 INFO L276 IsEmpty]: Start isEmpty. Operand 2549 states and 7593 transitions. [2021-06-05 14:11:39,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:39,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:39,238 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:39,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39699,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:39,438 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:39,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:39,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1785148859, now seen corresponding path program 393 times [2021-06-05 14:11:39,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:39,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649639806] [2021-06-05 14:11:39,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:39,487 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:39,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:39,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649639806] [2021-06-05 14:11:39,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649639806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:39,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342511412] [2021-06-05 14:11:39,487 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 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 14:11:39,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:11:39,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:39,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:39,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:39,583 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:39,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342511412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:39,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:39,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:11:39,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656678191] [2021-06-05 14:11:39,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:11:39,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:39,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:11:39,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:11:39,584 INFO L87 Difference]: Start difference. First operand 2549 states and 7593 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:39,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:39,753 INFO L93 Difference]: Finished difference Result 2990 states and 8433 transitions. [2021-06-05 14:11:39,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:11:39,753 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:39,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:39,757 INFO L225 Difference]: With dead ends: 2990 [2021-06-05 14:11:39,757 INFO L226 Difference]: Without dead ends: 2982 [2021-06-05 14:11:39,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 113.0ms TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:11:39,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2982 states. [2021-06-05 14:11:39,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2982 to 2581. [2021-06-05 14:11:39,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2581 states, 2580 states have (on average 2.9864341085271318) internal successors, (7705), 2580 states have internal predecessors, (7705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:39,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2581 states to 2581 states and 7705 transitions. [2021-06-05 14:11:39,793 INFO L78 Accepts]: Start accepts. Automaton has 2581 states and 7705 transitions. Word has length 21 [2021-06-05 14:11:39,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:39,793 INFO L482 AbstractCegarLoop]: Abstraction has 2581 states and 7705 transitions. [2021-06-05 14:11:39,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:39,793 INFO L276 IsEmpty]: Start isEmpty. Operand 2581 states and 7705 transitions. [2021-06-05 14:11:39,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:39,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:39,796 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:40,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39700 [2021-06-05 14:11:40,017 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:40,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:40,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1920192126, now seen corresponding path program 394 times [2021-06-05 14:11:40,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:40,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723958904] [2021-06-05 14:11:40,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:40,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:40,078 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:40,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:40,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723958904] [2021-06-05 14:11:40,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723958904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:40,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745337694] [2021-06-05 14:11:40,079 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 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 14:11:40,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:11:40,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:40,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:40,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:40,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745337694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:40,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:40,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:11:40,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455289636] [2021-06-05 14:11:40,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:11:40,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:40,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:11:40,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:11:40,163 INFO L87 Difference]: Start difference. First operand 2581 states and 7705 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:40,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:40,353 INFO L93 Difference]: Finished difference Result 2910 states and 8395 transitions. [2021-06-05 14:11:40,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:11:40,353 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:40,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:40,356 INFO L225 Difference]: With dead ends: 2910 [2021-06-05 14:11:40,356 INFO L226 Difference]: Without dead ends: 2910 [2021-06-05 14:11:40,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 158.5ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:11:40,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2021-06-05 14:11:40,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2663. [2021-06-05 14:11:40,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 2662 states have (on average 2.989105935386927) internal successors, (7957), 2662 states have internal predecessors, (7957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:40,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 7957 transitions. [2021-06-05 14:11:40,391 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 7957 transitions. Word has length 21 [2021-06-05 14:11:40,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:40,392 INFO L482 AbstractCegarLoop]: Abstraction has 2663 states and 7957 transitions. [2021-06-05 14:11:40,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:40,392 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 7957 transitions. [2021-06-05 14:11:40,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:40,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:40,394 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:40,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39701,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:40,601 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:40,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:40,601 INFO L82 PathProgramCache]: Analyzing trace with hash -764534401, now seen corresponding path program 395 times [2021-06-05 14:11:40,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:40,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572976676] [2021-06-05 14:11:40,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:40,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:40,660 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:40,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:40,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572976676] [2021-06-05 14:11:40,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572976676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:40,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602972468] [2021-06-05 14:11:40,660 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 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 14:11:40,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:11:40,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:40,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:40,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:40,736 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:40,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602972468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:40,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:40,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:11:40,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776065701] [2021-06-05 14:11:40,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:11:40,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:40,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:11:40,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:11:40,737 INFO L87 Difference]: Start difference. First operand 2663 states and 7957 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:40,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:40,905 INFO L93 Difference]: Finished difference Result 3615 states and 10212 transitions. [2021-06-05 14:11:40,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:11:40,906 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:40,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:40,910 INFO L225 Difference]: With dead ends: 3615 [2021-06-05 14:11:40,910 INFO L226 Difference]: Without dead ends: 3605 [2021-06-05 14:11:40,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 124.1ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:11:40,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3605 states. [2021-06-05 14:11:40,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3605 to 2661. [2021-06-05 14:11:40,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2661 states, 2660 states have (on average 2.9890977443609024) internal successors, (7951), 2660 states have internal predecessors, (7951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:40,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2661 states to 2661 states and 7951 transitions. [2021-06-05 14:11:40,948 INFO L78 Accepts]: Start accepts. Automaton has 2661 states and 7951 transitions. Word has length 21 [2021-06-05 14:11:40,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:40,948 INFO L482 AbstractCegarLoop]: Abstraction has 2661 states and 7951 transitions. [2021-06-05 14:11:40,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:40,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2661 states and 7951 transitions. [2021-06-05 14:11:40,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:40,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:40,951 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:41,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39702 [2021-06-05 14:11:41,175 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:41,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:41,176 INFO L82 PathProgramCache]: Analyzing trace with hash -891640232, now seen corresponding path program 396 times [2021-06-05 14:11:41,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:41,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639599919] [2021-06-05 14:11:41,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:41,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:41,237 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:41,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:41,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639599919] [2021-06-05 14:11:41,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639599919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:41,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804279409] [2021-06-05 14:11:41,238 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 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 14:11:41,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:11:41,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:41,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:41,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:41,313 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:41,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804279409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:41,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:41,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:11:41,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139561324] [2021-06-05 14:11:41,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:11:41,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:41,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:11:41,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:11:41,314 INFO L87 Difference]: Start difference. First operand 2661 states and 7951 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:41,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:41,494 INFO L93 Difference]: Finished difference Result 3050 states and 8892 transitions. [2021-06-05 14:11:41,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:11:41,495 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:41,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:41,498 INFO L225 Difference]: With dead ends: 3050 [2021-06-05 14:11:41,498 INFO L226 Difference]: Without dead ends: 3050 [2021-06-05 14:11:41,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 148.3ms TimeCoverageRelationStatistics Valid=181, Invalid=371, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:11:41,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3050 states. [2021-06-05 14:11:41,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3050 to 2842. [2021-06-05 14:11:41,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2841 states have (on average 2.9922562478000705) internal successors, (8501), 2841 states have internal predecessors, (8501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:41,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 8501 transitions. [2021-06-05 14:11:41,539 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 8501 transitions. Word has length 21 [2021-06-05 14:11:41,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:41,539 INFO L482 AbstractCegarLoop]: Abstraction has 2842 states and 8501 transitions. [2021-06-05 14:11:41,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:41,539 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 8501 transitions. [2021-06-05 14:11:41,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:41,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:41,542 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:41,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39703 [2021-06-05 14:11:41,757 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:41,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:41,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1799663163, now seen corresponding path program 397 times [2021-06-05 14:11:41,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:41,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869980613] [2021-06-05 14:11:41,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:41,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:41,819 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:11:41,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:41,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869980613] [2021-06-05 14:11:41,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869980613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:41,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004864625] [2021-06-05 14:11:41,820 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 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 14:11:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:41,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:41,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:41,892 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:11:41,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004864625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:41,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:41,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:11:41,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488245831] [2021-06-05 14:11:41,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:11:41,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:41,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:11:41,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:11:41,893 INFO L87 Difference]: Start difference. First operand 2842 states and 8501 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:42,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:42,053 INFO L93 Difference]: Finished difference Result 3614 states and 10275 transitions. [2021-06-05 14:11:42,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:11:42,053 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:42,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:42,057 INFO L225 Difference]: With dead ends: 3614 [2021-06-05 14:11:42,057 INFO L226 Difference]: Without dead ends: 3602 [2021-06-05 14:11:42,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 130.2ms TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:11:42,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3602 states. [2021-06-05 14:11:42,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3602 to 2842. [2021-06-05 14:11:42,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2841 states have (on average 2.9915522703273494) internal successors, (8499), 2841 states have internal predecessors, (8499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:42,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 8499 transitions. [2021-06-05 14:11:42,101 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 8499 transitions. Word has length 21 [2021-06-05 14:11:42,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:42,101 INFO L482 AbstractCegarLoop]: Abstraction has 2842 states and 8499 transitions. [2021-06-05 14:11:42,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:42,101 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 8499 transitions. [2021-06-05 14:11:42,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:42,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:42,104 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:42,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39704 [2021-06-05 14:11:42,325 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:42,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:42,325 INFO L82 PathProgramCache]: Analyzing trace with hash 2135869886, now seen corresponding path program 398 times [2021-06-05 14:11:42,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:42,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352219415] [2021-06-05 14:11:42,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:42,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:42,411 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:11:42,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:42,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352219415] [2021-06-05 14:11:42,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352219415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:42,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003463744] [2021-06-05 14:11:42,412 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 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 14:11:42,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:11:42,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:42,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:42,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:42,494 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:11:42,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003463744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:42,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:42,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 14:11:42,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555574] [2021-06-05 14:11:42,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:11:42,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:42,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:11:42,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:11:42,495 INFO L87 Difference]: Start difference. First operand 2842 states and 8499 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:42,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:42,600 INFO L93 Difference]: Finished difference Result 2996 states and 8829 transitions. [2021-06-05 14:11:42,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:11:42,601 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:42,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:42,604 INFO L225 Difference]: With dead ends: 2996 [2021-06-05 14:11:42,604 INFO L226 Difference]: Without dead ends: 2996 [2021-06-05 14:11:42,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 123.0ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:11:42,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2996 states. [2021-06-05 14:11:42,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2996 to 2879. [2021-06-05 14:11:42,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 2.991660875608061) internal successors, (8610), 2878 states have internal predecessors, (8610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:42,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 8610 transitions. [2021-06-05 14:11:42,641 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 8610 transitions. Word has length 21 [2021-06-05 14:11:42,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:42,641 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 8610 transitions. [2021-06-05 14:11:42,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:42,641 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 8610 transitions. [2021-06-05 14:11:42,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:42,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:42,644 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:42,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39705 [2021-06-05 14:11:42,853 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:42,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:42,853 INFO L82 PathProgramCache]: Analyzing trace with hash -314590977, now seen corresponding path program 399 times [2021-06-05 14:11:42,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:42,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886788989] [2021-06-05 14:11:42,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:42,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:42,915 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:42,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:42,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886788989] [2021-06-05 14:11:42,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886788989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:42,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071194182] [2021-06-05 14:11:42,916 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 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 14:11:42,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:11:42,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:42,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:42,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:43,001 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:43,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071194182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:43,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:43,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:11:43,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824731640] [2021-06-05 14:11:43,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:11:43,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:43,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:11:43,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:11:43,002 INFO L87 Difference]: Start difference. First operand 2879 states and 8610 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:43,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:43,182 INFO L93 Difference]: Finished difference Result 3624 states and 10338 transitions. [2021-06-05 14:11:43,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:11:43,182 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:43,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:43,186 INFO L225 Difference]: With dead ends: 3624 [2021-06-05 14:11:43,186 INFO L226 Difference]: Without dead ends: 3610 [2021-06-05 14:11:43,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 140.9ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:11:43,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2021-06-05 14:11:43,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 2900. [2021-06-05 14:11:43,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2900 states, 2899 states have (on average 2.9913763366678165) internal successors, (8672), 2899 states have internal predecessors, (8672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:43,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2900 states to 2900 states and 8672 transitions. [2021-06-05 14:11:43,229 INFO L78 Accepts]: Start accepts. Automaton has 2900 states and 8672 transitions. Word has length 21 [2021-06-05 14:11:43,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:43,229 INFO L482 AbstractCegarLoop]: Abstraction has 2900 states and 8672 transitions. [2021-06-05 14:11:43,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:43,229 INFO L276 IsEmpty]: Start isEmpty. Operand 2900 states and 8672 transitions. [2021-06-05 14:11:43,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:43,232 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:43,232 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:43,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39706,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:43,453 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:43,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:43,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1499403032, now seen corresponding path program 400 times [2021-06-05 14:11:43,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:43,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473389294] [2021-06-05 14:11:43,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:43,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:43,529 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:43,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:43,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473389294] [2021-06-05 14:11:43,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473389294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:43,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847102131] [2021-06-05 14:11:43,529 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 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 14:11:43,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:11:43,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:43,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:43,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:43,608 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:43,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847102131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:43,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:43,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:11:43,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40748588] [2021-06-05 14:11:43,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:11:43,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:43,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:11:43,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:11:43,609 INFO L87 Difference]: Start difference. First operand 2900 states and 8672 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:43,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:43,819 INFO L93 Difference]: Finished difference Result 3081 states and 9020 transitions. [2021-06-05 14:11:43,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:11:43,819 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:43,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:43,822 INFO L225 Difference]: With dead ends: 3081 [2021-06-05 14:11:43,822 INFO L226 Difference]: Without dead ends: 3081 [2021-06-05 14:11:43,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 179.5ms TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:11:43,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3081 states. [2021-06-05 14:11:43,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3081 to 2899. [2021-06-05 14:11:43,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2899 states, 2898 states have (on average 2.9913733609385784) internal successors, (8669), 2898 states have internal predecessors, (8669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:43,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2899 states to 2899 states and 8669 transitions. [2021-06-05 14:11:43,852 INFO L78 Accepts]: Start accepts. Automaton has 2899 states and 8669 transitions. Word has length 21 [2021-06-05 14:11:43,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:43,852 INFO L482 AbstractCegarLoop]: Abstraction has 2899 states and 8669 transitions. [2021-06-05 14:11:43,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:43,852 INFO L276 IsEmpty]: Start isEmpty. Operand 2899 states and 8669 transitions. [2021-06-05 14:11:43,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:43,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:43,854 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:44,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39707 [2021-06-05 14:11:44,055 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:44,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:44,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1431959877, now seen corresponding path program 401 times [2021-06-05 14:11:44,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:44,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945868049] [2021-06-05 14:11:44,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:44,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:44,130 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:44,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:44,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945868049] [2021-06-05 14:11:44,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945868049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:44,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799924817] [2021-06-05 14:11:44,131 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 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 14:11:44,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:11:44,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:44,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:44,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:44,206 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:44,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799924817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:44,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:44,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:11:44,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5349577] [2021-06-05 14:11:44,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:11:44,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:44,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:11:44,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:11:44,207 INFO L87 Difference]: Start difference. First operand 2899 states and 8669 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:44,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:44,300 INFO L93 Difference]: Finished difference Result 3250 states and 9452 transitions. [2021-06-05 14:11:44,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:11:44,305 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:44,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:44,309 INFO L225 Difference]: With dead ends: 3250 [2021-06-05 14:11:44,309 INFO L226 Difference]: Without dead ends: 3234 [2021-06-05 14:11:44,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:11:44,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3234 states. [2021-06-05 14:11:44,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3234 to 2899. [2021-06-05 14:11:44,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2899 states, 2898 states have (on average 2.9910282953761214) internal successors, (8668), 2898 states have internal predecessors, (8668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:44,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2899 states to 2899 states and 8668 transitions. [2021-06-05 14:11:44,350 INFO L78 Accepts]: Start accepts. Automaton has 2899 states and 8668 transitions. Word has length 21 [2021-06-05 14:11:44,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:44,350 INFO L482 AbstractCegarLoop]: Abstraction has 2899 states and 8668 transitions. [2021-06-05 14:11:44,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:44,350 INFO L276 IsEmpty]: Start isEmpty. Operand 2899 states and 8668 transitions. [2021-06-05 14:11:44,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:44,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:44,353 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:44,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39708,410 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:44,565 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:44,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:44,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1051200258, now seen corresponding path program 402 times [2021-06-05 14:11:44,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:44,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672994735] [2021-06-05 14:11:44,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:44,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:44,645 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:44,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:44,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672994735] [2021-06-05 14:11:44,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672994735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:44,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546572129] [2021-06-05 14:11:44,646 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 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 14:11:44,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:11:44,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:44,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:44,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:44,729 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:44,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546572129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:44,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:44,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:11:44,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584063414] [2021-06-05 14:11:44,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:11:44,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:44,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:11:44,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:11:44,730 INFO L87 Difference]: Start difference. First operand 2899 states and 8668 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:44,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:44,949 INFO L93 Difference]: Finished difference Result 3186 states and 9298 transitions. [2021-06-05 14:11:44,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:11:44,949 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:44,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:44,953 INFO L225 Difference]: With dead ends: 3186 [2021-06-05 14:11:44,953 INFO L226 Difference]: Without dead ends: 3186 [2021-06-05 14:11:44,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 203.9ms TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:11:44,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3186 states. [2021-06-05 14:11:44,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3186 to 2911. [2021-06-05 14:11:44,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2911 states, 2910 states have (on average 2.99106529209622) internal successors, (8704), 2910 states have internal predecessors, (8704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:44,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2911 states to 2911 states and 8704 transitions. [2021-06-05 14:11:44,990 INFO L78 Accepts]: Start accepts. Automaton has 2911 states and 8704 transitions. Word has length 21 [2021-06-05 14:11:44,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:44,990 INFO L482 AbstractCegarLoop]: Abstraction has 2911 states and 8704 transitions. [2021-06-05 14:11:44,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:44,990 INFO L276 IsEmpty]: Start isEmpty. Operand 2911 states and 8704 transitions. [2021-06-05 14:11:44,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:44,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:44,993 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:45,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39709,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:11:45,215 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:45,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:45,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1710657409, now seen corresponding path program 403 times [2021-06-05 14:11:45,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:45,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121058700] [2021-06-05 14:11:45,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:45,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:45,297 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 45 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:45,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:45,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121058700] [2021-06-05 14:11:45,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121058700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:45,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738934173] [2021-06-05 14:11:45,297 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 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 14:11:45,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:45,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:45,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:45,372 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 45 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:45,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738934173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:45,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:45,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:11:45,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507283918] [2021-06-05 14:11:45,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:11:45,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:45,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:11:45,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:11:45,373 INFO L87 Difference]: Start difference. First operand 2911 states and 8704 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:45,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:45,464 INFO L93 Difference]: Finished difference Result 3241 states and 9439 transitions. [2021-06-05 14:11:45,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:11:45,464 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:45,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:45,468 INFO L225 Difference]: With dead ends: 3241 [2021-06-05 14:11:45,468 INFO L226 Difference]: Without dead ends: 3223 [2021-06-05 14:11:45,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:11:45,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3223 states. [2021-06-05 14:11:45,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3223 to 2909. [2021-06-05 14:11:45,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2909 states, 2908 states have (on average 2.9917469050894083) internal successors, (8700), 2908 states have internal predecessors, (8700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:45,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2909 states to 2909 states and 8700 transitions. [2021-06-05 14:11:45,531 INFO L78 Accepts]: Start accepts. Automaton has 2909 states and 8700 transitions. Word has length 21 [2021-06-05 14:11:45,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:45,531 INFO L482 AbstractCegarLoop]: Abstraction has 2909 states and 8700 transitions. [2021-06-05 14:11:45,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:45,532 INFO L276 IsEmpty]: Start isEmpty. Operand 2909 states and 8700 transitions. [2021-06-05 14:11:45,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:11:45,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:45,535 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:45,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39710 [2021-06-05 14:11:45,757 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:45,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:45,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1484476376, now seen corresponding path program 404 times [2021-06-05 14:11:45,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:45,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174237937] [2021-06-05 14:11:45,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:45,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:45,870 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:45,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:45,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174237937] [2021-06-05 14:11:45,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174237937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:45,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165304792] [2021-06-05 14:11:45,870 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 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 14:11:45,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:11:45,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:45,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:11:45,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:45,972 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:45,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165304792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:45,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:45,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 14:11:45,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305272796] [2021-06-05 14:11:45,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:11:45,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:45,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:11:45,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:11:45,973 INFO L87 Difference]: Start difference. First operand 2909 states and 8700 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:46,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:46,220 INFO L93 Difference]: Finished difference Result 3418 states and 9945 transitions. [2021-06-05 14:11:46,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:11:46,220 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 14:11:46,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:46,224 INFO L225 Difference]: With dead ends: 3418 [2021-06-05 14:11:46,224 INFO L226 Difference]: Without dead ends: 3418 [2021-06-05 14:11:46,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 246.5ms TimeCoverageRelationStatistics Valid=345, Invalid=647, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:11:46,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3418 states. [2021-06-05 14:11:46,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3418 to 2927. [2021-06-05 14:11:46,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2927 states, 2926 states have (on average 2.9907723855092274) internal successors, (8751), 2926 states have internal predecessors, (8751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:46,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 8751 transitions. [2021-06-05 14:11:46,264 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 8751 transitions. Word has length 21 [2021-06-05 14:11:46,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:46,265 INFO L482 AbstractCegarLoop]: Abstraction has 2927 states and 8751 transitions. [2021-06-05 14:11:46,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:46,265 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 8751 transitions. [2021-06-05 14:11:46,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:46,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:46,268 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:46,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 413 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39711 [2021-06-05 14:11:46,481 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:46,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:46,481 INFO L82 PathProgramCache]: Analyzing trace with hash -857679500, now seen corresponding path program 405 times [2021-06-05 14:11:46,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:46,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511707199] [2021-06-05 14:11:46,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:46,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:46,666 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:46,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:46,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511707199] [2021-06-05 14:11:46,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511707199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:46,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924561446] [2021-06-05 14:11:46,667 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 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 14:11:46,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:11:46,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:46,703 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:11:46,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:47,329 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 14:11:47,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:11:47,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 14:11:48,360 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 282 [2021-06-05 14:11:49,209 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 427 [2021-06-05 14:11:49,625 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 619 DAG size of output: 503 [2021-06-05 14:11:50,068 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 619 DAG size of output: 503 [2021-06-05 14:11:50,551 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 627 DAG size of output: 511 [2021-06-05 14:11:51,008 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 513 DAG size of output: 538 [2021-06-05 14:11:51,403 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 305 [2021-06-05 14:11:51,546 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 215 [2021-06-05 14:11:52,331 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 392 [2021-06-05 14:11:52,594 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 392 [2021-06-05 14:11:52,883 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 588 DAG size of output: 402 [2021-06-05 14:11:53,069 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 417 [2021-06-05 14:11:53,404 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 353 [2021-06-05 14:11:54,033 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 222 [2021-06-05 14:11:54,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:11:54,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:11:54,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:11:54,618 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 14:11:54,622 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:54,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924561446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:54,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:11:54,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 14:11:54,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298997198] [2021-06-05 14:11:54,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 14:11:54,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:11:54,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 14:11:54,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:11:54,623 INFO L87 Difference]: Start difference. First operand 2927 states and 8751 transitions. Second operand has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:55,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:11:55,064 INFO L93 Difference]: Finished difference Result 3024 states and 8948 transitions. [2021-06-05 14:11:55,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:11:55,065 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:11:55,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:11:55,068 INFO L225 Difference]: With dead ends: 3024 [2021-06-05 14:11:55,068 INFO L226 Difference]: Without dead ends: 2991 [2021-06-05 14:11:55,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 682.5ms TimeCoverageRelationStatistics Valid=112, Invalid=1294, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:11:55,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2991 states. [2021-06-05 14:11:55,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2991 to 2948. [2021-06-05 14:11:55,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2948 states, 2947 states have (on average 2.98982015609094) internal successors, (8811), 2947 states have internal predecessors, (8811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:55,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2948 states to 2948 states and 8811 transitions. [2021-06-05 14:11:55,098 INFO L78 Accepts]: Start accepts. Automaton has 2948 states and 8811 transitions. Word has length 22 [2021-06-05 14:11:55,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:11:55,099 INFO L482 AbstractCegarLoop]: Abstraction has 2948 states and 8811 transitions. [2021-06-05 14:11:55,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:11:55,099 INFO L276 IsEmpty]: Start isEmpty. Operand 2948 states and 8811 transitions. [2021-06-05 14:11:55,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:11:55,102 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:11:55,102 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:11:55,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39712 [2021-06-05 14:11:55,302 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:11:55,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:11:55,303 INFO L82 PathProgramCache]: Analyzing trace with hash -599146780, now seen corresponding path program 406 times [2021-06-05 14:11:55,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:11:55,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597299181] [2021-06-05 14:11:55,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:11:55,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:11:55,435 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:11:55,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:11:55,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597299181] [2021-06-05 14:11:55,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597299181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:11:55,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320875754] [2021-06-05 14:11:55,436 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 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 14:11:55,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:11:55,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:11:55,462 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:11:55,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:11:55,940 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 14:11:55,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:11:55,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 14:11:56,979 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 289 [2021-06-05 14:11:57,162 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 309 [2021-06-05 14:11:57,346 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 309 [2021-06-05 14:11:57,588 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 317 [2021-06-05 14:11:57,709 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 324 [2021-06-05 14:11:58,031 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 400 [2021-06-05 14:11:58,229 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 291 [2021-06-05 14:11:58,402 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 292 [2021-06-05 14:11:58,939 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 216 [2021-06-05 14:11:59,128 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 243 [2021-06-05 14:11:59,358 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 508 DAG size of output: 337 [2021-06-05 14:11:59,672 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 358 [2021-06-05 14:11:59,946 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 358 [2021-06-05 14:12:00,248 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 537 DAG size of output: 364 [2021-06-05 14:12:00,492 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 368 [2021-06-05 14:12:00,598 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 300 [2021-06-05 14:12:00,708 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 249 [2021-06-05 14:12:01,428 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 231 [2021-06-05 14:12:01,543 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 231 [2021-06-05 14:12:01,684 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 236 [2021-06-05 14:12:01,852 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 254 [2021-06-05 14:12:02,844 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 248 [2021-06-05 14:12:02,968 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 248 [2021-06-05 14:12:03,079 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 249 [2021-06-05 14:12:03,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:12:03,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:12:03,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:12:03,595 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 14:12:03,599 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:03,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320875754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:03,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:12:03,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 14:12:03,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100805817] [2021-06-05 14:12:03,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 14:12:03,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:12:03,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 14:12:03,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:12:03,600 INFO L87 Difference]: Start difference. First operand 2948 states and 8811 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:04,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:12:04,304 INFO L93 Difference]: Finished difference Result 3054 states and 9036 transitions. [2021-06-05 14:12:04,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:12:04,304 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:12:04,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:12:04,309 INFO L225 Difference]: With dead ends: 3054 [2021-06-05 14:12:04,309 INFO L226 Difference]: Without dead ends: 3038 [2021-06-05 14:12:04,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 459.0ms TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:12:04,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3038 states. [2021-06-05 14:12:04,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3038 to 2970. [2021-06-05 14:12:04,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2969 states have (on average 2.9932637251599865) internal successors, (8887), 2969 states have internal predecessors, (8887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:04,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 8887 transitions. [2021-06-05 14:12:04,349 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 8887 transitions. Word has length 22 [2021-06-05 14:12:04,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:12:04,349 INFO L482 AbstractCegarLoop]: Abstraction has 2970 states and 8887 transitions. [2021-06-05 14:12:04,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:12:04,349 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 8887 transitions. [2021-06-05 14:12:04,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:12:04,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:12:04,353 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:12:04,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40164 [2021-06-05 14:12:04,570 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:12:04,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:12:04,570 INFO L82 PathProgramCache]: Analyzing trace with hash 144436580, now seen corresponding path program 407 times [2021-06-05 14:12:04,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:12:04,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181892111] [2021-06-05 14:12:04,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:12:04,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:12:04,711 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:12:04,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:12:04,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181892111] [2021-06-05 14:12:04,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181892111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:12:04,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390211266] [2021-06-05 14:12:04,712 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 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 14:12:04,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:12:04,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:12:04,749 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:12:04,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:12:05,380 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 14:12:05,381 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:12:05,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 14:12:06,559 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 243 [2021-06-05 14:12:06,774 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 344 [2021-06-05 14:12:07,880 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 328 [2021-06-05 14:12:08,316 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 680 DAG size of output: 564 [2021-06-05 14:12:08,766 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 680 DAG size of output: 564 [2021-06-05 14:12:09,321 WARN L205 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 693 DAG size of output: 577 [2021-06-05 14:12:10,160 WARN L205 SmtUtils]: Spent 833.00 ms on a formula simplification. DAG size of input: 579 DAG size of output: 742 [2021-06-05 14:12:10,566 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 273 [2021-06-05 14:12:11,475 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 149 [2021-06-05 14:12:11,630 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 172 [2021-06-05 14:12:11,843 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 191 [2021-06-05 14:12:12,134 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 290 [2021-06-05 14:12:12,290 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 491 [2021-06-05 14:12:12,623 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 278 [2021-06-05 14:12:13,269 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 193 [2021-06-05 14:12:13,803 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 278 [2021-06-05 14:12:14,064 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 352 [2021-06-05 14:12:14,181 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 224 [2021-06-05 14:12:15,329 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 324 [2021-06-05 14:12:15,538 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 334 [2021-06-05 14:12:15,845 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 372 [2021-06-05 14:12:16,439 WARN L205 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 906 DAG size of output: 642 [2021-06-05 14:12:17,369 WARN L205 SmtUtils]: Spent 926.00 ms on a formula simplification. DAG size of input: 1205 DAG size of output: 767 [2021-06-05 14:12:18,302 WARN L205 SmtUtils]: Spent 928.00 ms on a formula simplification. DAG size of input: 1205 DAG size of output: 767 [2021-06-05 14:12:19,639 WARN L205 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 1211 DAG size of output: 773 [2021-06-05 14:12:20,518 WARN L205 SmtUtils]: Spent 872.00 ms on a formula simplification. DAG size of input: 775 DAG size of output: 624 [2021-06-05 14:12:20,735 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 418 [2021-06-05 14:12:20,936 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 270 [2021-06-05 14:12:21,780 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 392 DAG size of output: 192 [2021-06-05 14:12:22,003 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 507 DAG size of output: 248 [2021-06-05 14:12:22,181 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 507 DAG size of output: 248 [2021-06-05 14:12:22,390 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 511 DAG size of output: 252 [2021-06-05 14:12:22,603 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 301 [2021-06-05 14:12:23,084 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 239 [2021-06-05 14:12:23,848 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 188 [2021-06-05 14:12:23,962 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 191 [2021-06-05 14:12:24,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:12:24,711 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-06-05 14:12:24,711 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-06-05 14:12:24,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-06-05 14:12:25,808 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 290 [2021-06-05 14:12:26,002 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 290 [2021-06-05 14:12:26,250 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 306 [2021-06-05 14:12:26,591 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 383 [2021-06-05 14:12:26,999 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 377 [2021-06-05 14:12:27,114 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 349 [2021-06-05 14:12:27,435 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 381 [2021-06-05 14:12:27,692 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 289 [2021-06-05 14:12:29,128 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 191 [2021-06-05 14:12:29,310 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 224 [2021-06-05 14:12:30,705 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 233 [2021-06-05 14:12:31,153 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 642 DAG size of output: 375 [2021-06-05 14:12:31,269 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 240 [2021-06-05 14:12:32,644 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 318 [2021-06-05 14:12:33,677 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 263 [2021-06-05 14:12:34,023 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 651 DAG size of output: 424 [2021-06-05 14:12:34,863 WARN L205 SmtUtils]: Spent 836.00 ms on a formula simplification. DAG size of input: 1119 DAG size of output: 706 [2021-06-05 14:12:35,938 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 1141 DAG size of output: 726 [2021-06-05 14:12:37,180 WARN L205 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 1313 DAG size of output: 869 [2021-06-05 14:12:39,169 WARN L205 SmtUtils]: Spent 1.98 s on a formula simplification. DAG size of input: 1375 DAG size of output: 917 [2021-06-05 14:12:41,726 WARN L205 SmtUtils]: Spent 2.55 s on a formula simplification. DAG size of input: 1507 DAG size of output: 1013 [2021-06-05 14:12:44,818 WARN L205 SmtUtils]: Spent 3.08 s on a formula simplification. DAG size of input: 1655 DAG size of output: 1120 [2021-06-05 14:12:48,071 WARN L205 SmtUtils]: Spent 3.24 s on a formula simplification. DAG size of input: 1655 DAG size of output: 1120 [2021-06-05 14:12:51,421 WARN L205 SmtUtils]: Spent 3.34 s on a formula simplification. DAG size of input: 1661 DAG size of output: 1107 [2021-06-05 14:12:55,312 WARN L205 SmtUtils]: Spent 3.88 s on a formula simplification. DAG size of input: 1109 DAG size of output: 1377 [2021-06-05 14:12:55,493 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 822 DAG size of output: 752 [2021-06-05 14:12:57,322 WARN L205 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 722 DAG size of output: 745 [2021-06-05 14:12:57,441 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 412 DAG size of output: 405 [2021-06-05 14:12:57,691 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 332 [2021-06-05 14:12:58,467 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 194 [2021-06-05 14:12:58,587 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 218 [2021-06-05 14:12:58,771 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 237 [2021-06-05 14:12:58,896 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 500 [2021-06-05 14:12:59,087 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 402 [2021-06-05 14:12:59,539 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 199 [2021-06-05 14:12:59,944 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 270 [2021-06-05 14:13:00,191 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 281 [2021-06-05 14:13:00,593 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 319 [2021-06-05 14:13:01,013 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 457 DAG size of output: 338 [2021-06-05 14:13:01,574 WARN L205 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 667 DAG size of output: 410 [2021-06-05 14:13:02,200 WARN L205 SmtUtils]: Spent 621.00 ms on a formula simplification. DAG size of input: 698 DAG size of output: 439 [2021-06-05 14:13:02,443 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 933 DAG size of output: 933 [2021-06-05 14:13:02,632 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 929 DAG size of output: 865 [2021-06-05 14:13:05,231 WARN L205 SmtUtils]: Spent 2.59 s on a formula simplification. DAG size of input: 835 DAG size of output: 1011 [2021-06-05 14:13:05,385 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 695 DAG size of output: 695 [2021-06-05 14:13:05,534 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 662 DAG size of output: 662 [2021-06-05 14:13:05,671 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 545 [2021-06-05 14:13:05,775 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 535 [2021-06-05 14:13:06,147 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 270 [2021-06-05 14:13:06,531 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 213 [2021-06-05 14:13:06,810 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 570 DAG size of output: 391 [2021-06-05 14:13:07,175 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 575 DAG size of output: 395 [2021-06-05 14:13:07,345 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 218 [2021-06-05 14:13:08,079 WARN L205 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 734 DAG size of output: 520 [2021-06-05 14:13:08,900 WARN L205 SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 800 DAG size of output: 564 [2021-06-05 14:13:09,020 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 482 DAG size of output: 482 [2021-06-05 14:13:09,856 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 432 DAG size of output: 217 [2021-06-05 14:13:09,977 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 147 [2021-06-05 14:13:10,344 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 284 [2021-06-05 14:13:10,607 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 574 DAG size of output: 329 [2021-06-05 14:13:11,519 WARN L205 SmtUtils]: Spent 907.00 ms on a formula simplification. DAG size of input: 1167 DAG size of output: 654 [2021-06-05 14:13:12,587 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 1198 DAG size of output: 683 [2021-06-05 14:13:13,664 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 1200 DAG size of output: 685 [2021-06-05 14:13:15,442 WARN L205 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 1640 DAG size of output: 908 [2021-06-05 14:13:17,228 WARN L205 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 1640 DAG size of output: 908 [2021-06-05 14:13:19,216 WARN L205 SmtUtils]: Spent 1.98 s on a formula simplification. DAG size of input: 1643 DAG size of output: 908 [2021-06-05 14:13:20,548 WARN L205 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 910 DAG size of output: 673 [2021-06-05 14:13:20,950 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 324 [2021-06-05 14:13:21,685 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 235 [2021-06-05 14:13:22,017 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 332 [2021-06-05 14:13:22,316 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 332 [2021-06-05 14:13:22,624 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 496 DAG size of output: 324 [2021-06-05 14:13:22,778 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 214 [2021-06-05 14:13:23,607 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:13:23,610 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:13:23,610 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:13:23,627 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:13:23,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:13:23,628 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-06-05 14:13:23,666 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:23,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390211266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:23,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:13:23,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 14:13:23,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469873749] [2021-06-05 14:13:23,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 14:13:23,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:13:23,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 14:13:23,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:13:23,667 INFO L87 Difference]: Start difference. First operand 2970 states and 8887 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:24,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:13:24,159 INFO L93 Difference]: Finished difference Result 3077 states and 9090 transitions. [2021-06-05 14:13:24,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:13:24,159 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:13:24,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:13:24,163 INFO L225 Difference]: With dead ends: 3077 [2021-06-05 14:13:24,163 INFO L226 Difference]: Without dead ends: 3067 [2021-06-05 14:13:24,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 514.6ms TimeCoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:13:24,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3067 states. [2021-06-05 14:13:24,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3067 to 2970. [2021-06-05 14:13:24,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2969 states have (on average 2.9932637251599865) internal successors, (8887), 2969 states have internal predecessors, (8887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:24,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 8887 transitions. [2021-06-05 14:13:24,204 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 8887 transitions. Word has length 22 [2021-06-05 14:13:24,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:13:24,204 INFO L482 AbstractCegarLoop]: Abstraction has 2970 states and 8887 transitions. [2021-06-05 14:13:24,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:24,205 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 8887 transitions. [2021-06-05 14:13:24,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:13:24,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:13:24,208 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:13:24,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40835,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:13:24,426 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:13:24,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:13:24,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1666470026, now seen corresponding path program 408 times [2021-06-05 14:13:24,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:13:24,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546335700] [2021-06-05 14:13:24,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:13:24,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:24,627 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:24,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:13:24,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546335700] [2021-06-05 14:13:24,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546335700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:24,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116356729] [2021-06-05 14:13:24,627 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 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 14:13:24,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:13:24,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:13:24,663 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:13:24,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:13:25,231 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 14:13:25,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:13:25,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 14:13:26,284 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 279 [2021-06-05 14:13:26,480 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 279 [2021-06-05 14:13:26,700 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 292 [2021-06-05 14:13:27,104 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 384 [2021-06-05 14:13:27,433 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 295 [2021-06-05 14:13:27,545 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 204 [2021-06-05 14:13:28,331 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 267 [2021-06-05 14:13:28,900 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 353 [2021-06-05 14:13:29,334 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 448 [2021-06-05 14:13:29,713 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 301 [2021-06-05 14:13:29,838 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 197 [2021-06-05 14:13:30,705 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 215 [2021-06-05 14:13:30,836 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 277 [2021-06-05 14:13:31,067 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 280 [2021-06-05 14:13:31,764 WARN L205 SmtUtils]: Spent 693.00 ms on a formula simplification. DAG size of input: 920 DAG size of output: 593 [2021-06-05 14:13:32,371 WARN L205 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 920 DAG size of output: 593 [2021-06-05 14:13:33,043 WARN L205 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 929 DAG size of output: 602 [2021-06-05 14:13:33,700 WARN L205 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 732 [2021-06-05 14:13:34,031 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 589 DAG size of output: 442 [2021-06-05 14:13:34,279 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 327 [2021-06-05 14:13:34,916 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 303 [2021-06-05 14:13:35,193 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 553 DAG size of output: 433 [2021-06-05 14:13:35,557 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 679 DAG size of output: 470 [2021-06-05 14:13:35,881 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 679 DAG size of output: 470 [2021-06-05 14:13:36,265 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 683 DAG size of output: 474 [2021-06-05 14:13:36,737 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 476 DAG size of output: 410 [2021-06-05 14:13:37,002 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 335 [2021-06-05 14:13:37,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:13:37,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:13:37,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:13:37,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 14:13:37,800 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:37,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116356729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:37,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:13:37,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 14:13:37,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346037433] [2021-06-05 14:13:37,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 14:13:37,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:13:37,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 14:13:37,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:13:37,800 INFO L87 Difference]: Start difference. First operand 2970 states and 8887 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:38,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:13:38,361 INFO L93 Difference]: Finished difference Result 3120 states and 9276 transitions. [2021-06-05 14:13:38,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:13:38,361 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:13:38,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:13:38,365 INFO L225 Difference]: With dead ends: 3120 [2021-06-05 14:13:38,365 INFO L226 Difference]: Without dead ends: 3104 [2021-06-05 14:13:38,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 534.3ms TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:13:38,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3104 states. [2021-06-05 14:13:38,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3104 to 3030. [2021-06-05 14:13:38,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3030 states, 3029 states have (on average 3.004291845493562) internal successors, (9100), 3029 states have internal predecessors, (9100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:38,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3030 states to 3030 states and 9100 transitions. [2021-06-05 14:13:38,404 INFO L78 Accepts]: Start accepts. Automaton has 3030 states and 9100 transitions. Word has length 22 [2021-06-05 14:13:38,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:13:38,404 INFO L482 AbstractCegarLoop]: Abstraction has 3030 states and 9100 transitions. [2021-06-05 14:13:38,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:13:38,404 INFO L276 IsEmpty]: Start isEmpty. Operand 3030 states and 9100 transitions. [2021-06-05 14:13:38,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:13:38,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:13:38,407 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:13:38,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43471 [2021-06-05 14:13:38,608 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:13:38,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:13:38,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1884913910, now seen corresponding path program 409 times [2021-06-05 14:13:38,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:13:38,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898878478] [2021-06-05 14:13:38,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:13:38,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:38,757 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:13:38,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:13:38,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898878478] [2021-06-05 14:13:38,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898878478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:13:38,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168511550] [2021-06-05 14:13:38,757 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 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 14:13:38,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:13:38,794 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:13:38,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:13:39,415 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 14:13:39,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:13:39,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 14:13:40,296 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 299 [2021-06-05 14:13:40,561 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 308 [2021-06-05 14:13:40,789 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 327 [2021-06-05 14:13:41,026 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 327 [2021-06-05 14:13:41,336 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 340 [2021-06-05 14:13:41,587 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 429 [2021-06-05 14:13:41,778 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 249 [2021-06-05 14:13:42,019 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 179 [2021-06-05 14:13:42,407 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 209 [2021-06-05 14:13:42,584 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 200 [2021-06-05 14:13:42,790 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 174 [2021-06-05 14:13:43,108 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 252 [2021-06-05 14:13:43,702 WARN L205 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 432 [2021-06-05 14:13:44,316 WARN L205 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 382 [2021-06-05 14:13:44,784 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 264 [2021-06-05 14:13:45,744 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 249 [2021-06-05 14:13:46,028 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 339 [2021-06-05 14:13:46,652 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 521 DAG size of output: 377 [2021-06-05 14:13:47,277 WARN L205 SmtUtils]: Spent 621.00 ms on a formula simplification. DAG size of input: 716 DAG size of output: 552 [2021-06-05 14:13:48,084 WARN L205 SmtUtils]: Spent 802.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 332 [2021-06-05 14:13:48,241 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 228 [2021-06-05 14:13:48,457 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 201 [2021-06-05 14:13:49,005 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 209 [2021-06-05 14:13:49,435 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 197 [2021-06-05 14:13:49,564 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 208 [2021-06-05 14:13:49,782 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 269 [2021-06-05 14:13:50,066 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 558 DAG size of output: 312 [2021-06-05 14:13:51,126 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 1029 DAG size of output: 698 [2021-06-05 14:13:52,386 WARN L205 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 1305 DAG size of output: 848 [2021-06-05 14:13:53,623 WARN L205 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 1305 DAG size of output: 848 [2021-06-05 14:13:55,080 WARN L205 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 1311 DAG size of output: 854 [2021-06-05 14:13:55,849 WARN L205 SmtUtils]: Spent 760.00 ms on a formula simplification. DAG size of input: 856 DAG size of output: 874 [2021-06-05 14:13:57,089 WARN L205 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 841 DAG size of output: 795 [2021-06-05 14:13:57,207 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 345 [2021-06-05 14:13:58,021 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 252 [2021-06-05 14:13:58,269 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 761 DAG size of output: 356 [2021-06-05 14:13:58,608 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 821 DAG size of output: 411 [2021-06-05 14:13:58,936 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 821 DAG size of output: 411 [2021-06-05 14:13:59,296 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 826 DAG size of output: 416 [2021-06-05 14:13:59,710 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 503 [2021-06-05 14:14:00,106 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 363 [2021-06-05 14:14:00,244 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 237 [2021-06-05 14:14:00,778 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 237 [2021-06-05 14:14:00,886 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 237 [2021-06-05 14:14:01,042 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 240 [2021-06-05 14:14:01,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:14:01,841 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-06-05 14:14:01,842 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-06-05 14:14:01,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-06-05 14:14:02,424 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 206 [2021-06-05 14:14:02,661 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 216 [2021-06-05 14:14:02,984 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 244 [2021-06-05 14:14:03,780 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 253 [2021-06-05 14:14:04,447 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 187 [2021-06-05 14:14:04,806 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 366 [2021-06-05 14:14:05,235 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 454 DAG size of output: 405 [2021-06-05 14:14:05,420 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 249 [2021-06-05 14:14:06,067 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 198 [2021-06-05 14:14:06,233 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 236 [2021-06-05 14:14:06,434 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 258 [2021-06-05 14:14:06,562 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 226 [2021-06-05 14:14:07,051 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 219 [2021-06-05 14:14:07,466 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 281 [2021-06-05 14:14:07,958 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 422 [2021-06-05 14:14:08,869 WARN L205 SmtUtils]: Spent 906.00 ms on a formula simplification. DAG size of input: 862 DAG size of output: 600 [2021-06-05 14:14:09,930 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 887 DAG size of output: 622 [2021-06-05 14:14:10,978 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 887 DAG size of output: 622 [2021-06-05 14:14:12,138 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 896 DAG size of output: 601 [2021-06-05 14:14:13,372 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 598 DAG size of output: 829 [2021-06-05 14:14:14,548 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 596 DAG size of output: 731 [2021-06-05 14:14:15,000 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 218 [2021-06-05 14:14:15,221 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 252 [2021-06-05 14:14:15,809 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 270 [2021-06-05 14:14:16,323 WARN L205 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 419 DAG size of output: 516 [2021-06-05 14:14:16,843 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 209 [2021-06-05 14:14:17,442 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 774 DAG size of output: 372 [2021-06-05 14:14:17,672 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 774 DAG size of output: 372 [2021-06-05 14:14:17,938 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 780 DAG size of output: 300 [2021-06-05 14:14:18,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:14:18,854 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:14:18,855 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:14:18,869 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:14:18,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:14:18,870 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-06-05 14:14:18,902 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:14:18,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168511550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:18,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:18,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 14:14:18,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165053402] [2021-06-05 14:14:18,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 14:14:18,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:18,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 14:14:18,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:14:18,902 INFO L87 Difference]: Start difference. First operand 3030 states and 9100 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:19,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:19,574 INFO L93 Difference]: Finished difference Result 3170 states and 9379 transitions. [2021-06-05 14:14:19,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:14:19,574 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:14:19,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:19,578 INFO L225 Difference]: With dead ends: 3170 [2021-06-05 14:14:19,578 INFO L226 Difference]: Without dead ends: 3151 [2021-06-05 14:14:19,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 587.9ms TimeCoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:14:19,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-06-05 14:14:19,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 3027. [2021-06-05 14:14:19,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3027 states, 3026 states have (on average 3.0023132848645075) internal successors, (9085), 3026 states have internal predecessors, (9085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:19,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3027 states to 3027 states and 9085 transitions. [2021-06-05 14:14:19,610 INFO L78 Accepts]: Start accepts. Automaton has 3027 states and 9085 transitions. Word has length 22 [2021-06-05 14:14:19,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:19,610 INFO L482 AbstractCegarLoop]: Abstraction has 3027 states and 9085 transitions. [2021-06-05 14:14:19,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:19,610 INFO L276 IsEmpty]: Start isEmpty. Operand 3027 states and 9085 transitions. [2021-06-05 14:14:19,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:14:19,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:19,613 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:14:19,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 418 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44029 [2021-06-05 14:14:19,814 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:14:19,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:19,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1033769778, now seen corresponding path program 410 times [2021-06-05 14:14:19,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:19,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204844711] [2021-06-05 14:14:19,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:19,941 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:14:19,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:19,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204844711] [2021-06-05 14:14:19,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204844711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:19,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043356463] [2021-06-05 14:14:19,941 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 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 14:14:19,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:14:19,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:14:19,969 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:14:19,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:20,451 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 14:14:20,452 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:14:20,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 14:14:21,125 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 245 [2021-06-05 14:14:21,247 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 250 [2021-06-05 14:14:21,366 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 250 [2021-06-05 14:14:21,506 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 263 [2021-06-05 14:14:21,881 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 295 [2021-06-05 14:14:22,643 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 216 [2021-06-05 14:14:23,067 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 173 [2021-06-05 14:14:23,269 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 289 [2021-06-05 14:14:23,572 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 334 [2021-06-05 14:14:23,708 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 273 [2021-06-05 14:14:23,840 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 179 [2021-06-05 14:14:24,644 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 256 [2021-06-05 14:14:24,754 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 161 [2021-06-05 14:14:25,478 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 355 [2021-06-05 14:14:26,010 WARN L205 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 557 DAG size of output: 483 [2021-06-05 14:14:26,646 WARN L205 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 486 [2021-06-05 14:14:27,628 WARN L205 SmtUtils]: Spent 978.00 ms on a formula simplification. DAG size of input: 839 DAG size of output: 660 [2021-06-05 14:14:28,603 WARN L205 SmtUtils]: Spent 970.00 ms on a formula simplification. DAG size of input: 839 DAG size of output: 660 [2021-06-05 14:14:29,621 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 847 DAG size of output: 668 [2021-06-05 14:14:29,825 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 670 DAG size of output: 697 [2021-06-05 14:14:30,829 WARN L205 SmtUtils]: Spent 948.00 ms on a formula simplification. DAG size of input: 667 DAG size of output: 766 [2021-06-05 14:14:31,251 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 323 [2021-06-05 14:14:31,798 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 719 DAG size of output: 390 [2021-06-05 14:14:32,068 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 719 DAG size of output: 390 [2021-06-05 14:14:32,381 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 723 DAG size of output: 394 [2021-06-05 14:14:33,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:14:33,631 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 183 [2021-06-05 14:14:33,632 INFO L354 Elim1Store]: treesize reduction 36, result has 90.0 percent of original size [2021-06-05 14:14:33,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 45 treesize of output 358 [2021-06-05 14:14:34,290 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 240 [2021-06-05 14:14:34,438 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 257 [2021-06-05 14:14:34,566 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 257 [2021-06-05 14:14:34,720 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 268 [2021-06-05 14:14:35,023 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 360 [2021-06-05 14:14:35,179 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 246 [2021-06-05 14:14:35,834 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 293 [2021-06-05 14:14:35,981 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 293 [2021-06-05 14:14:36,183 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 297 [2021-06-05 14:14:36,406 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 347 [2021-06-05 14:14:37,623 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 213 [2021-06-05 14:14:38,138 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 14:14:38,141 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:14:38,141 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:14:38,155 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 14:14:38,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:14:38,156 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:151, output treesize:15 [2021-06-05 14:14:38,186 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:14:38,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043356463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:38,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:38,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 14:14:38,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645611000] [2021-06-05 14:14:38,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 14:14:38,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:38,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 14:14:38,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:14:38,187 INFO L87 Difference]: Start difference. First operand 3027 states and 9085 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:38,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:38,585 INFO L93 Difference]: Finished difference Result 3114 states and 9269 transitions. [2021-06-05 14:14:38,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:14:38,585 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:14:38,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:38,588 INFO L225 Difference]: With dead ends: 3114 [2021-06-05 14:14:38,588 INFO L226 Difference]: Without dead ends: 3104 [2021-06-05 14:14:38,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 509.9ms TimeCoverageRelationStatistics Valid=123, Invalid=1137, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:14:38,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3104 states. [2021-06-05 14:14:38,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3104 to 3030. [2021-06-05 14:14:38,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3030 states, 3029 states have (on average 3.0023109937273027) internal successors, (9094), 3029 states have internal predecessors, (9094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:38,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3030 states to 3030 states and 9094 transitions. [2021-06-05 14:14:38,618 INFO L78 Accepts]: Start accepts. Automaton has 3030 states and 9094 transitions. Word has length 22 [2021-06-05 14:14:38,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:38,618 INFO L482 AbstractCegarLoop]: Abstraction has 3030 states and 9094 transitions. [2021-06-05 14:14:38,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:38,618 INFO L276 IsEmpty]: Start isEmpty. Operand 3030 states and 9094 transitions. [2021-06-05 14:14:38,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:14:38,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:38,620 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:14:38,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45381 [2021-06-05 14:14:38,821 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:14:38,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:38,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1113853020, now seen corresponding path program 411 times [2021-06-05 14:14:38,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:38,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817772543] [2021-06-05 14:14:38,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:38,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:14:38,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:38,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817772543] [2021-06-05 14:14:38,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817772543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:38,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302204735] [2021-06-05 14:14:38,946 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 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 14:14:38,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:14:38,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:14:38,975 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:14:38,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:39,491 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 14:14:39,491 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:14:39,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 14:14:40,501 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 229 [2021-06-05 14:14:41,207 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 198 [2021-06-05 14:14:41,372 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 212 [2021-06-05 14:14:41,521 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 214 [2021-06-05 14:14:41,631 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 208 [2021-06-05 14:14:41,740 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 197 [2021-06-05 14:14:42,553 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 222 [2021-06-05 14:14:42,786 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 272 [2021-06-05 14:14:42,940 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 430 DAG size of output: 279 [2021-06-05 14:14:43,372 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 614 DAG size of output: 407 [2021-06-05 14:14:43,814 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 614 DAG size of output: 407 [2021-06-05 14:14:44,325 WARN L205 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 623 DAG size of output: 416 [2021-06-05 14:14:44,563 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 386 [2021-06-05 14:14:45,202 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 248 [2021-06-05 14:14:45,377 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 248 [2021-06-05 14:14:45,716 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 306 [2021-06-05 14:14:46,552 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 260 [2021-06-05 14:14:46,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:14:46,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:14:46,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:14:46,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:3 [2021-06-05 14:14:46,897 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:14:46,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302204735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:46,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:46,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 14:14:46,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224902736] [2021-06-05 14:14:46,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 14:14:46,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:46,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 14:14:46,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:14:46,898 INFO L87 Difference]: Start difference. First operand 3030 states and 9094 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:47,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:47,362 INFO L93 Difference]: Finished difference Result 3173 states and 9458 transitions. [2021-06-05 14:14:47,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:14:47,363 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:14:47,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:47,367 INFO L225 Difference]: With dead ends: 3173 [2021-06-05 14:14:47,367 INFO L226 Difference]: Without dead ends: 3157 [2021-06-05 14:14:47,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 448.2ms TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:14:47,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3157 states. [2021-06-05 14:14:47,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3157 to 3081. [2021-06-05 14:14:47,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3081 states, 3080 states have (on average 3.0107142857142857) internal successors, (9273), 3080 states have internal predecessors, (9273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:47,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3081 states to 3081 states and 9273 transitions. [2021-06-05 14:14:47,413 INFO L78 Accepts]: Start accepts. Automaton has 3081 states and 9273 transitions. Word has length 22 [2021-06-05 14:14:47,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:47,413 INFO L482 AbstractCegarLoop]: Abstraction has 3081 states and 9273 transitions. [2021-06-05 14:14:47,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:47,413 INFO L276 IsEmpty]: Start isEmpty. Operand 3081 states and 9273 transitions. [2021-06-05 14:14:47,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:14:47,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:47,416 INFO L521 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:14:47,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46366,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:14:47,630 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:14:47,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:47,630 INFO L82 PathProgramCache]: Analyzing trace with hash -370269660, now seen corresponding path program 412 times [2021-06-05 14:14:47,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:47,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586107855] [2021-06-05 14:14:47,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:47,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:47,775 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:14:47,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:47,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586107855] [2021-06-05 14:14:47,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586107855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:47,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656176059] [2021-06-05 14:14:47,775 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 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 14:14:47,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:14:47,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:14:47,809 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 14:14:47,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:48,446 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 14:14:48,447 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:14:48,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 43 treesize of output 319 [2021-06-05 14:14:49,030 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 208 [2021-06-05 14:14:49,658 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 239 [2021-06-05 14:14:49,803 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 247 [2021-06-05 14:14:50,141 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 362 [2021-06-05 14:14:50,415 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 362 [2021-06-05 14:14:50,763 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 370 [2021-06-05 14:14:51,193 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 391 [2021-06-05 14:14:51,394 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 268 [2021-06-05 14:14:52,364 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 345 [2021-06-05 14:14:53,090 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 312 [2021-06-05 14:14:53,729 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 260 [2021-06-05 14:14:53,988 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 307 [2021-06-05 14:14:54,228 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 307 [2021-06-05 14:14:54,552 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 314 [2021-06-05 14:14:54,871 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 348 [2021-06-05 14:14:54,984 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 219 [2021-06-05 14:14:55,548 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 235 [2021-06-05 14:14:55,651 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 174 [2021-06-05 14:14:56,108 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 252 [2021-06-05 14:14:56,223 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 218 [2021-06-05 14:14:56,650 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 266 [2021-06-05 14:14:56,868 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 367 [2021-06-05 14:14:57,035 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 367 [2021-06-05 14:14:57,226 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 515 DAG size of output: 371 Received shutdown request... [2021-06-05 14:14:57,646 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 468 [2021-06-05 14:14:57,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46810 [2021-06-05 14:14:57,849 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 14:14:57,850 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 14:14:57,852 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 14:14:57,852 INFO L202 PluginConnector]: Adding new model unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 02:14:57 BasicIcfg [2021-06-05 14:14:57,852 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 14:14:57,852 INFO L168 Benchmark]: Toolchain (without parser) took 919571.11 ms. Allocated memory was 314.6 MB in the beginning and 2.8 GB in the end (delta: 2.5 GB). Free memory was 293.4 MB in the beginning and 1.4 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.7 GB. Max. memory is 16.0 GB. [2021-06-05 14:14:57,852 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 314.6 MB. Free memory is still 294.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 14:14:57,852 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.52 ms. Allocated memory is still 314.6 MB. Free memory was 293.3 MB in the beginning and 291.9 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 14:14:57,852 INFO L168 Benchmark]: Boogie Preprocessor took 17.40 ms. Allocated memory is still 314.6 MB. Free memory was 291.9 MB in the beginning and 291.0 MB in the end (delta: 945.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 14:14:57,853 INFO L168 Benchmark]: RCFGBuilder took 412.04 ms. Allocated memory is still 314.6 MB. Free memory was 290.8 MB in the beginning and 273.6 MB in the end (delta: 17.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. [2021-06-05 14:14:57,853 INFO L168 Benchmark]: TraceAbstraction took 919106.49 ms. Allocated memory was 314.6 MB in the beginning and 2.8 GB in the end (delta: 2.5 GB). Free memory was 273.1 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.7 GB. Max. memory is 16.0 GB. [2021-06-05 14:14:57,853 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 0.11 ms. Allocated memory is still 314.6 MB. Free memory is still 294.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.52 ms. Allocated memory is still 314.6 MB. Free memory was 293.3 MB in the beginning and 291.9 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 17.40 ms. Allocated memory is still 314.6 MB. Free memory was 291.9 MB in the beginning and 291.0 MB in the end (delta: 945.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 412.04 ms. Allocated memory is still 314.6 MB. Free memory was 290.8 MB in the beginning and 273.6 MB in the end (delta: 17.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 919106.49 ms. Allocated memory was 314.6 MB in the beginning and 2.8 GB in the end (delta: 2.5 GB). Free memory was 273.1 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.7 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 9,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 9,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 9,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 22 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 919029.1ms, OverallIterations: 424, TraceHistogramMax: 9, EmptinessCheckTime: 626.2ms, AutomataDifference: 145234.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 8792 SDtfs, 22844 SDslu, 66230 SDs, 0 SdLazy, 130335 SolverSat, 15691 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 61906.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15922 GetRequests, 5895 SyntacticMatches, 182 SemanticMatches, 9845 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63253 ImplicationChecksByTransitivity, 135496.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3997occurred in iteration=279, InterpolantAutomatonStates: 8397, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 8367.7ms AutomataMinimizationTime, 423 MinimizatonAttempts, 89558 StatesRemovedByMinimization, 420 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1507.7ms SsaConstructionTime, 5198.6ms SatisfiabilityAnalysisTime, 649046.7ms InterpolantComputationTime, 15622 NumberOfCodeBlocks, 15622 NumberOfCodeBlocksAsserted, 1678 NumberOfCheckSat, 14780 ConstructedInterpolants, 9 QuantifiedInterpolants, 141451 SizeOfPredicates, 563 NumberOfNonLiveVariables, 30984 ConjunctsInSsa, 9930 ConjunctsInUnsatCore, 842 InterpolantComputations, 4 PerfectInterpolantSequences, 5297/24835 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